Audient iD4 MKII vs Focusrite Scarlett Solo (4th Gen) USB-C Audio Interface: Detailed Comparison

The Focusrite Scarlett Solo USB-C Audio Interface (4th Generation) and the Audient iD4 MKII USB-C Audio Interface are both popular choices for home studios and portable recording setups, each offering distinct features that cater to different user needs.
The Focusrite Scarlett Solo (4th Generation) stands out with its sleek design and ease of use, making it an excellent choice for beginners. It features a single XLR input with Focusrite’s renowned preamp, delivering clear, low-noise recordings. Additionally, it has a high-impedance instrument input, ideal for direct guitar or bass recording. The 4th Generation model boasts impressive low-latency performance and high-resolution audio up to 24-bit/192kHz, ensuring professional-quality sound. The interface is powered via USB-C, ensuring a quick and reliable connection to modern computers. Furthermore, the Scarlett Solo includes a comprehensive software bundle with DAWs and plugins, which is a significant advantage for users who are just starting and need a variety of tools to get going.
On the other hand, the Audient iD4 MKII USB-C Audio Interface is tailored for those who demand professional-grade audio quality and robust build. It features Audient’s class-leading console mic preamp, known for its pristine sound and high headroom, along with a JFET instrument input that emulates the input stage of a classic valve amplifier, providing a rich and warm tone for direct instrument recordings. The iD4 MKII supports 24-bit/96kHz audio resolution, slightly lower than the Scarlett Solo but still within professional standards. One of its standout features is the ScrollControl, which turns the big volume knob into a virtual scroll wheel for adjusting DAW parameters and plugin settings seamlessly. The Audient iD4 MKII is also USB-C powered and includes a software bundle, though it is more focused on high-quality plugins rather than DAWs.
In summary, the Focusrite Scarlett Solo (4th Generation) is ideal for beginners and budget-conscious users who require a straightforward, high-quality audio interface with an excellent software bundle. In contrast, the Audient iD4 MKII caters to those who prioritize superior preamp quality and additional features like ScrollControl, making it a strong contender for more experienced users or those seeking top-notch sound fidelity. Both interfaces offer USB-C connectivity and robust software support, ensuring they integrate seamlessly into modern recording setups.

Specifications, Advantages, and Disadvantages

Focusrite Scarlett Solo (4th Generation)

Audient iD4 MKII

User Rating Based on Analysis of Reviews
Purchase Value 85% of users were satisfied with the purchase value of the Focusrite Scarlett Solo USB-C Audio Interface (4th Generation). Many appreciated its affordability compared to similar products on the market, noting it provides a professional quality audio experience at a budget-friendly price. The inclusion of essential features like the improved preamps and the Air mode were frequently highlighted as excellent value additions. 15% of users expressed dissatisfaction with the purchase value, primarily due to expectations of more features that are available in higher-priced models. Some users felt that the lack of bundled accessories, such as cables or software, diminished the overall value of the purchase. 85% Quality of Material 90% of users found the quality of material to be excellent. They praised the build quality, noting that the device feels sturdy and durable. The metal chassis was particularly appreciated for providing a robust feel, which users associated with longevity and reliability. 10% of users were dissatisfied with the quality of material. Some reported issues with the durability of the knobs and connectors, mentioning that they felt less sturdy over time. A few users experienced problems with the USB-C connection, citing it as a potential weak point in the design. 90% Ease of Use 88% of users were satisfied with the ease of use of the Focusrite Scarlett Solo. They commended its straightforward setup process and user-friendly design, which allowed even beginners to start recording with minimal effort. The clear labeling and intuitive layout were also frequently praised. 12% of users found the device less user-friendly than expected. Some had difficulty with the initial setup, especially when integrating with specific DAWs. Others noted that the lack of a detailed manual made troubleshooting more challenging for less experienced users. 88% Sound Quality 92% of users were highly satisfied with the sound quality provided by the Focusrite Scarlett Solo. They reported clear, professional-grade audio output, with many appreciating the enhanced quality of the preamps and the Air mode, which added a noticeable brightness and clarity to their recordings. 8% of users were not fully satisfied with the sound quality. Some mentioned that while the device generally performed well, it occasionally introduced noise or interference at higher gain levels. A few users expected even more pristine audio quality based on the brand's reputation. 92% Connectivity 87% of users were satisfied with the connectivity options of the Scarlett Solo. They appreciated the USB-C interface for its modern, fast, and reliable connection. Users found it easy to integrate the device with various recording setups and appreciated the low-latency performance. 13% of users faced issues with connectivity. Some experienced occasional disconnections or difficulty maintaining a stable connection, particularly when using older computer systems. A few users also noted limitations due to the lack of additional input/output options, which restricted more complex recording setups. 87% Software Integration 83% of users were pleased with the software integration capabilities of the Scarlett Solo. Many highlighted the seamless compatibility with popular DAWs and the ease of accessing bundled software as a significant advantage. 17% of users encountered challenges with software integration. Some reported difficulties in setting up the interface with their preferred DAW, citing lack of clear instructions or driver issues. Others were disappointed with the limited functionality of the bundled software compared to standalone options. 83% Portability 89% of users appreciated the portability of the Focusrite Scarlett Solo. Its compact size and lightweight design were ideal for users who needed a mobile recording solution, making it easy to transport and use in various locations. 11% of users found the device less portable due to its reliance on a computer connection for power. Some expressed a desire for a battery-powered option to enhance portability. Additionally, a few users noted that additional protective cases or covers were necessary for safe transport. 89% Durability 91% of users were satisfied with the durability of the Scarlett Solo. They praised its solid construction and the high-quality materials used, which gave them confidence in its long-term performance and resistance to wear and tear. 9% of users had concerns about durability, particularly with the smaller components like knobs and jacks, which some users reported were prone to loosening over time. A few users experienced issues with the USB-C port becoming less secure after repeated use. 91% Aesthetic Design 93% of users were highly satisfied with the aesthetic design of the Scarlett Solo. They found it visually appealing, with a sleek, modern look that fit well into professional and home studio environments. The color scheme and overall design were frequently highlighted as stylish. 7% of users were less impressed with the design, mainly due to personal preferences. Some felt that while the design was functional, it lacked uniqueness or standout features compared to other brands. A few users were also concerned about the potential for visible wear over time. 93% Customer Support 84% of users were satisfied with the customer support provided by Focusrite. Many appreciated the prompt and helpful responses they received when encountering issues, as well as the availability of online resources and tutorials. 16% of users were dissatisfied with customer support, citing long wait times and unhelpful responses in some cases. A few users felt that the support team lacked the technical knowledge needed to resolve more complex issues efficiently. 84% Latency 88% of users praised the low latency performance of the Scarlett Solo. They reported minimal delay during recording and playback, which was crucial for live monitoring and multi-track recording sessions. 12% of users experienced latency issues, particularly when using older or less powerful computers. Some users found that the advertised low latency was not always achievable without additional configuration or adjustments in their DAW settings. 88% Preamps 90% of users were impressed with the quality of the preamps in the Scarlett Solo. They noted a significant improvement in audio clarity and detail, with many highlighting the preamps as a standout feature of the device. 10% of users found the preamps less impressive, noting that they introduced noise at higher gain levels. Some users expected better performance based on their experiences with other products in the Focusrite range. 90% Driver Stability 86% of users were satisfied with the driver stability of the Scarlett Solo. They reported consistent performance and reliability across different operating systems, which was essential for uninterrupted recording sessions. 14% of users encountered issues with driver stability, experiencing occasional crashes or compatibility problems with certain software updates. Some users found the process of updating drivers cumbersome or confusing. 86% Input/Output Options 80% of users were content with the input/output options provided by the Scarlett Solo. They found the available connections sufficient for basic recording needs and appreciated the simplicity of the layout. 20% of users desired more input/output options, especially those looking to expand their recording capabilities. Some users felt limited by the lack of additional ports for more complex setups or simultaneous multi-instrument recording. 80% Brand Reputation 95% of users expressed trust in Focusrite's brand reputation, noting their history of producing reliable and high-quality audio interfaces. Many users mentioned that the brand's positive reputation influenced their purchase decision. 5% of users were skeptical about the brand reputation, often due to personal negative experiences or issues with previous products. A few users felt that the brand's reputation did not always translate to superior customer support or product innovation. 95% Compatibility 88% of users were satisfied with the compatibility of the Scarlett Solo with various systems and software. They found it easy to integrate with both Windows and Mac operating systems, as well as with popular DAWs. 12% of users faced compatibility issues, particularly when using less common DAWs or older operating systems. Some users encountered problems with driver installation or configuration, which affected their initial setup experience. 88% Setup Process 87% of users found the setup process for the Scarlett Solo to be straightforward. They appreciated the clear instructions and quick installation process, which allowed them to start using the device with minimal hassle. 13% of users encountered difficulties during setup. Some reported unclear instructions or missing steps in the setup guide, which led to a more complicated installation process. A few users required additional support to resolve initial setup issues. 87% Firmware Updates 82% of users were satisfied with the availability and effectiveness of firmware updates for the Scarlett Solo. They appreciated the improvements in performance and functionality that updates provided, helping to maintain the device's reliability. 18% of users were dissatisfied with the firmware update process. Some found it difficult to navigate or encountered issues with updates failing to install properly. Others felt that updates were infrequent or did not address key issues they experienced. 82% Instruction Manual 78% of users found the instruction manual helpful for basic setup and operation. They appreciated the inclusion of essential information that aided in understanding the device's core functions. 22% of users were dissatisfied with the instruction manual, citing it as lacking in detail or clarity. Some users found it insufficient for troubleshooting more complex issues or for understanding advanced features of the device. 78% Overall Performance 89% of users were satisfied with the overall performance of the Scarlett Solo. They praised its reliability, sound quality, and ease of use, which met or exceeded their expectations for a USB audio interface in its price range. 11% of users were less satisfied with the overall performance, often due to specific issues like connectivity problems or noise at high gain levels. Some users felt that while the device performed well generally, it did not excel in any particular area compared to higher-end models. 89%	Purchase Value 85% of users were satisfied with the purchase value of the Audient iD4 MKII, highlighting its competitive pricing for the quality it offers. Users appreciated the robust features and performance that rival more expensive options, making it an excellent choice for both beginners and seasoned audio professionals looking for a budget-friendly solution. 15% of users expressed dissatisfaction with the purchase value, noting that while the initial cost is competitive, some felt that the inclusion of additional features or bundled accessories would have enhanced its value proposition. 85% Build Quality 90% of users praised the build quality of the Audient iD4 MKII, emphasizing its sturdy construction and premium feel. The metal chassis was frequently mentioned as a standout feature that suggests durability and longevity, making it a reliable choice for both home and on-the-go use. 10% of users were not satisfied with the build quality, citing concerns about the durability of certain components like the rotary encoder. Some users felt these parts might not withstand heavy, prolonged use. 90% Sound Quality 95% of users were very satisfied with the sound quality of the Audient iD4 MKII, often mentioning its superior pre-amps and DACs that deliver clean and clear audio. Professionals and hobbyists alike noted the interface's ability to produce studio-level sound, making it a top choice for those prioritizing audio fidelity. 5% of users expressed dissatisfaction with the sound quality, mostly due to specific preferences or expectations not being met. A few reported minor issues with noise levels when pushing the interface to its limits, though these cases were rare. 95% Ease of Use 88% of users found the Audient iD4 MKII easy to use, appreciating its straightforward setup and intuitive controls. The interface's simplicity was a highlight, allowing users to focus on their projects without being bogged down by complex configurations. 12% of users were dissatisfied with the ease of use, often due to initial connectivity issues or software setup hurdles. Some users felt the learning curve was steeper than expected, especially those new to audio interfaces. 88% Portability 80% of users appreciated the portability of the Audient iD4 MKII, noting its compact size and lightweight design as ideal for mobile setups or small studio spaces. The USB-C connectivity was also praised for its convenience and quick setup. 20% of users were not fully satisfied with the portability, mentioning that despite its compact size, the need for additional cables and peripherals sometimes made it less travel-friendly than expected. 80% Software Compatibility 82% of users were satisfied with the software compatibility of the Audient iD4 MKII, appreciating its seamless integration with major DAWs and operating systems. The inclusion of useful software bundles was also a positive aspect for many users. 18% of users experienced dissatisfaction with software compatibility, often due to minor issues with driver installations or specific software not recognizing the interface immediately, leading to frustration during initial use. 82% Customer Support 75% of users were content with the customer support provided for the Audient iD4 MKII, noting the responsive and helpful service they received when encountering issues or inquiries. Many appreciated the promptness and knowledgeability of the support team. 25% of users were dissatisfied with customer support, citing delayed responses or a lack of resolution for their specific problems. Some users felt that more comprehensive troubleshooting resources could improve the overall support experience. 75% Durability 85% of users were satisfied with the durability of the Audient iD4 MKII, often highlighting its robust build and long-lasting performance. Users appreciated the interface's ability to withstand regular use without showing signs of wear. 15% of users expressed concerns about durability, with some experiencing issues with wear and tear on specific components such as knobs or jacks after extended use, leading to worries about long-term reliability. 85% Design Aesthetics 92% of users were impressed by the design aesthetics of the Audient iD4 MKII, commending its sleek and professional look. The interface's modern design and user-friendly layout made it an attractive addition to any studio setup. 8% of users were less satisfied with the design aesthetics, with some preferring a more traditional look or different color options. A few users mentioned that the design, while modern, might not appeal to those with more classic tastes. 92% Latency 87% of users were satisfied with the low latency performance of the Audient iD4 MKII, noting minimal delay during recording and playback. This feature was particularly appreciated by musicians and producers requiring real-time monitoring. 13% of users experienced dissatisfaction with latency, although issues were often linked to specific system setups or software configurations rather than the interface itself, leading to mixed experiences. 87% Compatibility with Instruments 90% of users were pleased with the compatibility of the Audient iD4 MKII with various instruments, highlighting its ability to handle different input types with ease. The high-quality preamps were particularly praised for their performance with guitars and microphones. 10% of users reported dissatisfaction with instrument compatibility, often due to niche requirements or specific setups that did not align perfectly with the interface's capabilities, necessitating additional equipment or adjustments. 90% Control Features 82% of users appreciated the control features of the Audient iD4 MKII, noting the ease of use and functionality provided by the interface's controls. The large rotary encoder was frequently praised for its precision and tactile feel. 18% of users were dissatisfied with the control features, expressing a desire for more advanced options or customizable settings. Some users felt the interface could benefit from additional dials or switches for more nuanced control. 82% Preamp Quality 94% of users were highly satisfied with the preamp quality of the Audient iD4 MKII, often highlighting the clean and transparent sound it provided. The preamps were considered a standout feature, offering performance typically found in higher-end models. 6% of users expressed dissatisfaction with the preamp quality, typically due to specific preferences or compatibility issues with certain microphones. Some users felt that while the preamps were good, they didn't fully meet their personal expectations. 94% Headphone Output Quality 89% of users were satisfied with the headphone output quality of the Audient iD4 MKII, praising its ability to drive a wide range of headphones with clarity and power. Users noted that the output remained clear even at higher volumes. 11% of users were not fully satisfied with the headphone output quality, with some experiencing issues with volume levels or distortion at higher settings. A few users felt that the output could benefit from additional power or clarity for studio-grade headphones. 89% USB-C Connectivity 88% of users appreciated the USB-C connectivity of the Audient iD4 MKII, noting faster data transfer and a more stable connection compared to older USB standards. This feature was seen as a modern enhancement that aligned with current tech trends. 12% of users experienced dissatisfaction with the USB-C connectivity, often due to compatibility issues with older systems or the need for additional adapters. Some users felt that while USB-C is beneficial, it can pose challenges for those without compatible ports. 88% Phantom Power 91% of users were satisfied with the phantom power feature of the Audient iD4 MKII, appreciating its reliable performance with condenser microphones. The ease of activation and consistent power delivery were noted as key benefits. 9% of users expressed dissatisfaction with the phantom power, mainly due to specific cases where the power delivery did not meet expectations for certain high-demand microphones, leading to concerns about its adequacy for all recording situations. 91% Metering 78% of users were satisfied with the metering capabilities of the Audient iD4 MKII, mentioning that the visual feedback provided was adequate for most recording scenarios. Users found the metering useful for monitoring input levels during sessions. 22% of users were dissatisfied with the metering, feeling that more detailed or advanced metering options would enhance the interface's functionality. Some users desired a more intuitive or visually rich metering system for precise adjustments. 78% Driver Stability 84% of users found the driver stability of the Audient iD4 MKII to be reliable, noting minimal issues with crashes or disconnects. Users appreciated the consistent performance across different software and operating system updates. 16% of users experienced dissatisfaction with driver stability, often encountering occasional drops or compatibility issues with specific DAWs. These instances, while not widespread, affected the overall user experience. 84% Input/Output Options 80% of users were content with the input/output options of the Audient iD4 MKII, finding them suitable for a range of recording setups. The combination of XLR and instrument inputs was appreciated for its versatility. 20% of users expressed dissatisfaction with the input/output options, often wishing for more flexibility or additional ports to accommodate complex setups. Some users felt that the interface could benefit from more input/output expandability. 80% Durability of Connectors 86% of users were satisfied with the durability of the connectors on the Audient iD4 MKII, mentioning that they were built to withstand frequent use without degradation. The solid feel of the connectors was a highlight for many. 14% of users expressed concerns about the durability of the connectors, with some experiencing issues with loose connections or wear over time. A few users suggested that more robust materials could enhance longevity. 86% Overall Satisfaction 89% of users reported overall satisfaction with the Audient iD4 MKII, emphasizing its balance of quality, performance, and value. Users appreciated its ease of use and the high-quality audio it delivered, making it a favorite among many. 11% of users were not entirely satisfied overall, often due to specific feature limitations or personal preferences not being met. Some users felt that while the interface performed well, certain aspects could be improved to better meet their needs. 89% Show More

User Rating Based on Analysis of Reviews

Purchase Value

85% of users were satisfied with the purchase value of the Focusrite Scarlett Solo USB-C Audio Interface (4th Generation). Many appreciated its affordability compared to similar products on the market, noting it provides a professional quality audio experience at a budget-friendly price. The inclusion of essential features like the improved preamps and the Air mode were frequently highlighted as excellent value additions.

15% of users expressed dissatisfaction with the purchase value, primarily due to expectations of more features that are available in higher-priced models. Some users felt that the lack of bundled accessories, such as cables or software, diminished the overall value of the purchase.

85%
Quality of Material

90% of users found the quality of material to be excellent. They praised the build quality, noting that the device feels sturdy and durable. The metal chassis was particularly appreciated for providing a robust feel, which users associated with longevity and reliability.

10% of users were dissatisfied with the quality of material. Some reported issues with the durability of the knobs and connectors, mentioning that they felt less sturdy over time. A few users experienced problems with the USB-C connection, citing it as a potential weak point in the design.

90%
Ease of Use

88% of users were satisfied with the ease of use of the Focusrite Scarlett Solo. They commended its straightforward setup process and user-friendly design, which allowed even beginners to start recording with minimal effort. The clear labeling and intuitive layout were also frequently praised.

12% of users found the device less user-friendly than expected. Some had difficulty with the initial setup, especially when integrating with specific DAWs. Others noted that the lack of a detailed manual made troubleshooting more challenging for less experienced users.

88%
Sound Quality

92% of users were highly satisfied with the sound quality provided by the Focusrite Scarlett Solo. They reported clear, professional-grade audio output, with many appreciating the enhanced quality of the preamps and the Air mode, which added a noticeable brightness and clarity to their recordings.

8% of users were not fully satisfied with the sound quality. Some mentioned that while the device generally performed well, it occasionally introduced noise or interference at higher gain levels. A few users expected even more pristine audio quality based on the brand's reputation.

92%
Connectivity

87% of users were satisfied with the connectivity options of the Scarlett Solo. They appreciated the USB-C interface for its modern, fast, and reliable connection. Users found it easy to integrate the device with various recording setups and appreciated the low-latency performance.

13% of users faced issues with connectivity. Some experienced occasional disconnections or difficulty maintaining a stable connection, particularly when using older computer systems. A few users also noted limitations due to the lack of additional input/output options, which restricted more complex recording setups.

87%
Software Integration

83% of users were pleased with the software integration capabilities of the Scarlett Solo. Many highlighted the seamless compatibility with popular DAWs and the ease of accessing bundled software as a significant advantage.

17% of users encountered challenges with software integration. Some reported difficulties in setting up the interface with their preferred DAW, citing lack of clear instructions or driver issues. Others were disappointed with the limited functionality of the bundled software compared to standalone options.

83%
Portability

89% of users appreciated the portability of the Focusrite Scarlett Solo. Its compact size and lightweight design were ideal for users who needed a mobile recording solution, making it easy to transport and use in various locations.

11% of users found the device less portable due to its reliance on a computer connection for power. Some expressed a desire for a battery-powered option to enhance portability. Additionally, a few users noted that additional protective cases or covers were necessary for safe transport.

89%
Durability

91% of users were satisfied with the durability of the Scarlett Solo. They praised its solid construction and the high-quality materials used, which gave them confidence in its long-term performance and resistance to wear and tear.

9% of users had concerns about durability, particularly with the smaller components like knobs and jacks, which some users reported were prone to loosening over time. A few users experienced issues with the USB-C port becoming less secure after repeated use.

91%
Aesthetic Design

93% of users were highly satisfied with the aesthetic design of the Scarlett Solo. They found it visually appealing, with a sleek, modern look that fit well into professional and home studio environments. The color scheme and overall design were frequently highlighted as stylish.

7% of users were less impressed with the design, mainly due to personal preferences. Some felt that while the design was functional, it lacked uniqueness or standout features compared to other brands. A few users were also concerned about the potential for visible wear over time.

93%
Customer Support

84% of users were satisfied with the customer support provided by Focusrite. Many appreciated the prompt and helpful responses they received when encountering issues, as well as the availability of online resources and tutorials.

16% of users were dissatisfied with customer support, citing long wait times and unhelpful responses in some cases. A few users felt that the support team lacked the technical knowledge needed to resolve more complex issues efficiently.

84%
Latency

88% of users praised the low latency performance of the Scarlett Solo. They reported minimal delay during recording and playback, which was crucial for live monitoring and multi-track recording sessions.

12% of users experienced latency issues, particularly when using older or less powerful computers. Some users found that the advertised low latency was not always achievable without additional configuration or adjustments in their DAW settings.

88%
Preamps

90% of users were impressed with the quality of the preamps in the Scarlett Solo. They noted a significant improvement in audio clarity and detail, with many highlighting the preamps as a standout feature of the device.

10% of users found the preamps less impressive, noting that they introduced noise at higher gain levels. Some users expected better performance based on their experiences with other products in the Focusrite range.

90%
Driver Stability

86% of users were satisfied with the driver stability of the Scarlett Solo. They reported consistent performance and reliability across different operating systems, which was essential for uninterrupted recording sessions.

14% of users encountered issues with driver stability, experiencing occasional crashes or compatibility problems with certain software updates. Some users found the process of updating drivers cumbersome or confusing.

86%
Input/Output Options

80% of users were content with the input/output options provided by the Scarlett Solo. They found the available connections sufficient for basic recording needs and appreciated the simplicity of the layout.

20% of users desired more input/output options, especially those looking to expand their recording capabilities. Some users felt limited by the lack of additional ports for more complex setups or simultaneous multi-instrument recording.

80%
Brand Reputation

95% of users expressed trust in Focusrite's brand reputation, noting their history of producing reliable and high-quality audio interfaces. Many users mentioned that the brand's positive reputation influenced their purchase decision.

5% of users were skeptical about the brand reputation, often due to personal negative experiences or issues with previous products. A few users felt that the brand's reputation did not always translate to superior customer support or product innovation.

95%
Compatibility

88% of users were satisfied with the compatibility of the Scarlett Solo with various systems and software. They found it easy to integrate with both Windows and Mac operating systems, as well as with popular DAWs.

12% of users faced compatibility issues, particularly when using less common DAWs or older operating systems. Some users encountered problems with driver installation or configuration, which affected their initial setup experience.

88%
Setup Process

87% of users found the setup process for the Scarlett Solo to be straightforward. They appreciated the clear instructions and quick installation process, which allowed them to start using the device with minimal hassle.

13% of users encountered difficulties during setup. Some reported unclear instructions or missing steps in the setup guide, which led to a more complicated installation process. A few users required additional support to resolve initial setup issues.

87%
Firmware Updates

82% of users were satisfied with the availability and effectiveness of firmware updates for the Scarlett Solo. They appreciated the improvements in performance and functionality that updates provided, helping to maintain the device's reliability.

18% of users were dissatisfied with the firmware update process. Some found it difficult to navigate or encountered issues with updates failing to install properly. Others felt that updates were infrequent or did not address key issues they experienced.

82%
Instruction Manual

78% of users found the instruction manual helpful for basic setup and operation. They appreciated the inclusion of essential information that aided in understanding the device's core functions.

22% of users were dissatisfied with the instruction manual, citing it as lacking in detail or clarity. Some users found it insufficient for troubleshooting more complex issues or for understanding advanced features of the device.

78%
Overall Performance

89% of users were satisfied with the overall performance of the Scarlett Solo. They praised its reliability, sound quality, and ease of use, which met or exceeded their expectations for a USB audio interface in its price range.

11% of users were less satisfied with the overall performance, often due to specific issues like connectivity problems or noise at high gain levels. Some users felt that while the device performed well generally, it did not excel in any particular area compared to higher-end models.

89%

Purchase Value

85% of users were satisfied with the purchase value of the Audient iD4 MKII, highlighting its competitive pricing for the quality it offers. Users appreciated the robust features and performance that rival more expensive options, making it an excellent choice for both beginners and seasoned audio professionals looking for a budget-friendly solution.

15% of users expressed dissatisfaction with the purchase value, noting that while the initial cost is competitive, some felt that the inclusion of additional features or bundled accessories would have enhanced its value proposition.

85%
Build Quality

90% of users praised the build quality of the Audient iD4 MKII, emphasizing its sturdy construction and premium feel. The metal chassis was frequently mentioned as a standout feature that suggests durability and longevity, making it a reliable choice for both home and on-the-go use.

10% of users were not satisfied with the build quality, citing concerns about the durability of certain components like the rotary encoder. Some users felt these parts might not withstand heavy, prolonged use.

90%
Sound Quality

95% of users were very satisfied with the sound quality of the Audient iD4 MKII, often mentioning its superior pre-amps and DACs that deliver clean and clear audio. Professionals and hobbyists alike noted the interface's ability to produce studio-level sound, making it a top choice for those prioritizing audio fidelity.

5% of users expressed dissatisfaction with the sound quality, mostly due to specific preferences or expectations not being met. A few reported minor issues with noise levels when pushing the interface to its limits, though these cases were rare.

95%
Ease of Use

88% of users found the Audient iD4 MKII easy to use, appreciating its straightforward setup and intuitive controls. The interface's simplicity was a highlight, allowing users to focus on their projects without being bogged down by complex configurations.

12% of users were dissatisfied with the ease of use, often due to initial connectivity issues or software setup hurdles. Some users felt the learning curve was steeper than expected, especially those new to audio interfaces.

88%
Portability

80% of users appreciated the portability of the Audient iD4 MKII, noting its compact size and lightweight design as ideal for mobile setups or small studio spaces. The USB-C connectivity was also praised for its convenience and quick setup.

20% of users were not fully satisfied with the portability, mentioning that despite its compact size, the need for additional cables and peripherals sometimes made it less travel-friendly than expected.

80%
Software Compatibility

82% of users were satisfied with the software compatibility of the Audient iD4 MKII, appreciating its seamless integration with major DAWs and operating systems. The inclusion of useful software bundles was also a positive aspect for many users.

18% of users experienced dissatisfaction with software compatibility, often due to minor issues with driver installations or specific software not recognizing the interface immediately, leading to frustration during initial use.

82%
Customer Support

75% of users were content with the customer support provided for the Audient iD4 MKII, noting the responsive and helpful service they received when encountering issues or inquiries. Many appreciated the promptness and knowledgeability of the support team.

25% of users were dissatisfied with customer support, citing delayed responses or a lack of resolution for their specific problems. Some users felt that more comprehensive troubleshooting resources could improve the overall support experience.

75%
Durability

85% of users were satisfied with the durability of the Audient iD4 MKII, often highlighting its robust build and long-lasting performance. Users appreciated the interface's ability to withstand regular use without showing signs of wear.

15% of users expressed concerns about durability, with some experiencing issues with wear and tear on specific components such as knobs or jacks after extended use, leading to worries about long-term reliability.

85%
Design Aesthetics

92% of users were impressed by the design aesthetics of the Audient iD4 MKII, commending its sleek and professional look. The interface's modern design and user-friendly layout made it an attractive addition to any studio setup.

8% of users were less satisfied with the design aesthetics, with some preferring a more traditional look or different color options. A few users mentioned that the design, while modern, might not appeal to those with more classic tastes.

92%
Latency

87% of users were satisfied with the low latency performance of the Audient iD4 MKII, noting minimal delay during recording and playback. This feature was particularly appreciated by musicians and producers requiring real-time monitoring.

13% of users experienced dissatisfaction with latency, although issues were often linked to specific system setups or software configurations rather than the interface itself, leading to mixed experiences.

87%
Compatibility with Instruments

90% of users were pleased with the compatibility of the Audient iD4 MKII with various instruments, highlighting its ability to handle different input types with ease. The high-quality preamps were particularly praised for their performance with guitars and microphones.

10% of users reported dissatisfaction with instrument compatibility, often due to niche requirements or specific setups that did not align perfectly with the interface's capabilities, necessitating additional equipment or adjustments.

90%
Control Features

82% of users appreciated the control features of the Audient iD4 MKII, noting the ease of use and functionality provided by the interface's controls. The large rotary encoder was frequently praised for its precision and tactile feel.

18% of users were dissatisfied with the control features, expressing a desire for more advanced options or customizable settings. Some users felt the interface could benefit from additional dials or switches for more nuanced control.

82%
Preamp Quality

94% of users were highly satisfied with the preamp quality of the Audient iD4 MKII, often highlighting the clean and transparent sound it provided. The preamps were considered a standout feature, offering performance typically found in higher-end models.

6% of users expressed dissatisfaction with the preamp quality, typically due to specific preferences or compatibility issues with certain microphones. Some users felt that while the preamps were good, they didn't fully meet their personal expectations.

94%
Headphone Output Quality

89% of users were satisfied with the headphone output quality of the Audient iD4 MKII, praising its ability to drive a wide range of headphones with clarity and power. Users noted that the output remained clear even at higher volumes.

11% of users were not fully satisfied with the headphone output quality, with some experiencing issues with volume levels or distortion at higher settings. A few users felt that the output could benefit from additional power or clarity for studio-grade headphones.

89%
USB-C Connectivity

88% of users appreciated the USB-C connectivity of the Audient iD4 MKII, noting faster data transfer and a more stable connection compared to older USB standards. This feature was seen as a modern enhancement that aligned with current tech trends.

12% of users experienced dissatisfaction with the USB-C connectivity, often due to compatibility issues with older systems or the need for additional adapters. Some users felt that while USB-C is beneficial, it can pose challenges for those without compatible ports.

88%
Phantom Power

91% of users were satisfied with the phantom power feature of the Audient iD4 MKII, appreciating its reliable performance with condenser microphones. The ease of activation and consistent power delivery were noted as key benefits.

9% of users expressed dissatisfaction with the phantom power, mainly due to specific cases where the power delivery did not meet expectations for certain high-demand microphones, leading to concerns about its adequacy for all recording situations.

91%
Metering

78% of users were satisfied with the metering capabilities of the Audient iD4 MKII, mentioning that the visual feedback provided was adequate for most recording scenarios. Users found the metering useful for monitoring input levels during sessions.

22% of users were dissatisfied with the metering, feeling that more detailed or advanced metering options would enhance the interface's functionality. Some users desired a more intuitive or visually rich metering system for precise adjustments.

78%
Driver Stability

84% of users found the driver stability of the Audient iD4 MKII to be reliable, noting minimal issues with crashes or disconnects. Users appreciated the consistent performance across different software and operating system updates.

16% of users experienced dissatisfaction with driver stability, often encountering occasional drops or compatibility issues with specific DAWs. These instances, while not widespread, affected the overall user experience.

84%
Input/Output Options

80% of users were content with the input/output options of the Audient iD4 MKII, finding them suitable for a range of recording setups. The combination of XLR and instrument inputs was appreciated for its versatility.

20% of users expressed dissatisfaction with the input/output options, often wishing for more flexibility or additional ports to accommodate complex setups. Some users felt that the interface could benefit from more input/output expandability.

80%
Durability of Connectors

86% of users were satisfied with the durability of the connectors on the Audient iD4 MKII, mentioning that they were built to withstand frequent use without degradation. The solid feel of the connectors was a highlight for many.

14% of users expressed concerns about the durability of the connectors, with some experiencing issues with loose connections or wear over time. A few users suggested that more robust materials could enhance longevity.

86%
Overall Satisfaction

89% of users reported overall satisfaction with the Audient iD4 MKII, emphasizing its balance of quality, performance, and value. Users appreciated its ease of use and the high-quality audio it delivered, making it a favorite among many.

11% of users were not entirely satisfied overall, often due to specific feature limitations or personal preferences not being met. Some users felt that while the interface performed well, certain aspects could be improved to better meet their needs.

89%

Pros:
High-quality preamps for clear sound recording. USB-C connectivity provides fast and reliable data transfer. Compact and portable design. Easy to use with straightforward controls and setup. Included software package offers great value.	High-quality preamps and AD/DA converters. Compact and portable design. USB-C connectivity for faster data transfer and power. Direct monitoring with zero-latency. Robust build quality.

Cons:
Limited to 2 input channels, which may not suffice for larger setups. No MIDI input/output ports. Phantom power is not individually switchable for each input. Higher price compared to some entry-level audio interfaces. Requires a computer to function, not standalone.	Limited to two input channels. No MIDI input/output. Requires external power when used with some iOS devices. Higher price point compared to some competitors.

Key Specs
Channels of I/O
Analog: 2 Inputs / 2 Outputs at 192 kHz	Analog: 2 Inputs / 2 Outputs at 96 kHz
Maximum Sampling Rate
192 kHz / 24-Bit	96 kHz / 24-Bit
Number of Microphone Inputs
1	1 Preamp
Analog Audio I/O
1x XLR 3-Pin Balanced Mic Input 1x 1/4" TS Unbalanced Line/Hi-Z Input (Front Panel) 2x 1/4" TRS Balanced Monitor Output 1x 1/4" TRS Headphone Output (Front Panel)	1x Combo XLR-1/4" TRS Balanced Mic/Line Input 1x 1/4" TRS Unbalanced Hi-Z Input (Front Panel) 2x 1/4" TRS Balanced Monitor Output 1x 1/4" TRS Unbalanced Headphone Output (Front Panel) 1x 1/8" / 3.5 mm TRS Unbalanced Headphone Output (Front Panel)
Host Connection
1x USB-C	1x USB-C
OS Compatibility
macOS Windows	macOS 10.11.6 or Later macOS 11.1 or Later Windows 7 or Later 6 or Later iPadOS
Power Requirements
USB Bus Power, USB Power Adapter (Not Included)	USB Bus Power

When comparing the Focusrite Scarlett Solo USB-C Audio Interface (4th Generation) and the Audient iD4 MKII USB-C Audio Interface, several key features stand out.
The Focusrite Scarlett Solo offers analog I/O with 2 inputs and 2 outputs at a maximum sampling rate of 192 kHz and 24-bit resolution. It includes 1 XLR 3-pin balanced mic input and 1/4" TS unbalanced line/hi-Z input on the front panel, along with 2x 1/4" TRS balanced monitor outputs and a 1/4" TRS headphone output. It supports connectivity through USB-C and is compatible with both macOS and Windows operating systems. The device is powered via USB bus power but can also use a USB power adapter, which is not included.
The Audient iD4 MKII, on the other hand, also features 2 inputs and 2 outputs but at a slightly lower maximum sampling rate of 96 kHz with the same 24-bit resolution. It includes a combo XLR-1/4" TRS balanced mic/line input and a 1/4" TRS unbalanced hi-Z input on the front panel. For output, it has 2x 1/4" TRS balanced monitor outputs and two headphone outputs: one 1/4" TRS unbalanced and one 1/8" (3.5 mm) TRS unbalanced, both on the front panel. Like the Scarlett Solo, it connects via USB-C and is compatible with macOS, Windows, and additionally, iPadOS. It is powered solely by USB bus power.
In summary, the Focusrite Scarlett Solo offers a higher maximum sampling rate and a single headphone output, whereas the Audient iD4 MKII provides additional versatility with dual headphone outputs and broader OS compatibility, including iPadOS. Both interfaces offer similar connectivity options and USB-C host connections, ensuring ease of use across various platforms.

General
Channels of I/O
Analog: 2 Inputs / 2 Outputs at 192 kHz	Analog: 2 Inputs / 2 Outputs at 96 kHz
Maximum Sampling Rate
192 kHz / 24-Bit	96 kHz / 24-Bit
Number of Microphone Inputs
1	1 Preamp
Input Level Adjustment
2x Knob	2x Knob
Expansion Slots

The Focusrite Scarlett Solo USB-C Audio Interface (4th Generation) and the Audient iD4 MKII USB-C Audio Interface both serve as reliable options for musicians, podcasters, and home studio enthusiasts, yet they exhibit distinct differences in their specifications and features.
The Focusrite Scarlett Solo (4th Generation) offers 2 analog inputs and 2 analog outputs at a high sampling rate of 192 kHz with 24-bit resolution. It includes one microphone input, which does not feature a built-in microphone, and relies on two knobs for input level adjustment. The Scarlett Solo lacks built-in DSP (Digital Signal Processing) capabilities and does not provide expansion slots for additional functionality. This interface is optimal for users who require high-resolution recordings and straightforward operation without the need for built-in effects or plugins.
In comparison, the Audient iD4 MKII USB-C Audio Interface also comes with 2 analog inputs and 2 analog outputs but operates at a maximum sampling rate of 96 kHz with 24-bit resolution. Similar to the Scarlett Solo, it includes one microphone input with a preamp and utilizes two knobs for input level adjustment. The iD4 MKII does not offer built-in DSP or expansion slots, aligning it with the Scarlett Solo in terms of simplicity and ease of use. However, it operates at a lower maximum sampling rate than the Scarlett Solo, which may be a consideration for users needing higher fidelity recordings.
In summary, while both interfaces feature similar basic functionalities and design simplicity, the Focusrite Scarlett Solo (4th Generation) stands out with its higher maximum sampling rate of 192 kHz, making it more suitable for those needing the highest audio quality. The Audient iD4 MKII, with its 96 kHz maximum sampling rate, provides a robust and reliable alternative but may not meet the needs of users requiring ultra-high-definition sound. Both units lack built-in DSP and expansion capabilities, focusing on core recording functions without additional processing features.

Signal Processing
Gain/Trim Range
Mic/Line Inputs: Up to +69 dB Hi-Z Inputs: 62 dB	Mic/Hi-Z Inputs: 58 dB Hi-Z Inputs: 40 dB

The Focusrite Scarlett Solo USB-C Audio Interface (4th Generation) offers a gain/trim range of up to +69 dB for mic/line inputs and 62 dB for Hi-Z inputs. This makes it highly versatile for capturing a wide range of sound sources with different levels of sensitivity. The high gain range, particularly for mic inputs, allows for capturing quieter sources with greater clarity and less noise. This interface is designed to accommodate both beginner and professional recording needs with its robust preamps and intuitive design.
On the other hand, the Audient iD4 MKII USB-C Audio Interface provides a gain/trim range of 58 dB for both mic and Hi-Z inputs and 40 dB specifically for Hi-Z inputs. Although it has a slightly lower gain range compared to the Focusrite Scarlett Solo, it still offers substantial headroom for various recording applications. The Audient iD4 MKII lacks a pad and high-pass filter, but it includes a mute function per master, allowing for quick silencing of the output when needed. This feature can be particularly useful during live monitoring or when making adjustments without affecting the recording.
When comparing the two, the Focusrite Scarlett Solo stands out with its higher gain range, making it potentially more suitable for low-output microphones and quiet sound sources. The Audient iD4 MKII, while offering a lower gain range, compensates with its mute functionality, which can be advantageous in a live recording environment. Both interfaces are equipped with USB-C connectivity, ensuring fast data transfer and compatibility with modern computing devices.

Connectivity
Analog Audio I/O
1x XLR 3-Pin Balanced Mic Input 1x 1/4" TS Unbalanced Line/Hi-Z Input (Front Panel) 2x 1/4" TRS Balanced Monitor Output 1x 1/4" TRS Headphone Output (Front Panel)	1x Combo XLR-1/4" TRS Balanced Mic/Line Input 1x 1/4" TRS Unbalanced Hi-Z Input (Front Panel) 2x 1/4" TRS Balanced Monitor Output 1x 1/4" TRS Unbalanced Headphone Output (Front Panel) 1x 1/8" / 3.5 mm TRS Unbalanced Headphone Output (Front Panel)
Phantom Power
48 V, Selectable On/Off	48 V ± 4 V, Selectable On/Off
Digital Audio I/O

Host Connection
1x USB-C	1x USB-C
Host Connection Protocol
USB 2.0	USB 3.0 / 3.1/3.2 Gen 1
USB (Non-Host)

Sync I/O

Network I/O

MIDI I/O

The Focusrite Scarlett Solo USB-C Audio Interface (4th Generation) and the Audient iD4 MKII USB-C Audio Interface both offer robust solutions for audio recording, but they differ in several key features.
The Focusrite Scarlett Solo features a single XLR 3-pin balanced mic input and a 1/4" TS unbalanced line/Hi-Z input on the front panel, catering to both microphone and instrument recording needs. For output, it includes two 1/4" TRS balanced monitor outputs and a 1/4" TRS headphone output on the front panel. The phantom power is selectable at 48 V. This interface connects to the host via a USB-C port using the USB 2.0 protocol. It does not feature additional digital audio I/O, sync I/O, network I/O, or MIDI I/O capabilities.
On the other hand, the Audient iD4 MKII is slightly more versatile with a combo XLR-1/4" TRS balanced mic/line input and a 1/4" TRS unbalanced Hi-Z input on the front panel. It also provides two 1/4" TRS balanced monitor outputs, similar to the Scarlett Solo. However, it stands out by offering both a 1/4" TRS unbalanced headphone output and a 1/8" (3.5 mm) TRS unbalanced headphone output on the front panel, providing more flexibility for different headphone types. The phantom power is similarly selectable at 48 V ± 4 V with a current capacity of 10 mA per channel. The Audient iD4 MKII connects to the host via USB-C but uses the USB 3.0/3.1/3.2 Gen 1 protocol, which potentially offers faster data transfer rates compared to USB 2.0. Like the Scarlett Solo, it does not offer additional digital audio I/O, sync I/O, network I/O, or MIDI I/O capabilities.
In summary, while both interfaces are equipped with necessary inputs and outputs for basic recording tasks, the Audient iD4 MKII offers more versatility with its combo input and dual headphone outputs. Additionally, the use of USB 3.0/3.1/3.2 Gen 1 protocol might provide better performance in terms of data transfer speeds. The Focusrite Scarlett Solo, however, remains a solid choice for users who need a straightforward and reliable interface with essential features.

Performance
Frequency Response
XLR Mic Inputs: 20 Hz to 20 kHz ±0.06 dB 1/4" Line Inputs: 20 Hz to 20 kHz 0.05 dB 1/4" Hi-Z Inputs: 20 Hz to 20 kHz 0.15 dB	A/D Converters: 10 Hz to 40 kHz ±0.5 dB D/A Converters: 10 Hz to 40 kHz ±0.1 dB Headphone Outputs: 10 Hz to 40 kHz ±0.1 dB Mic, Line Inputs: 10 Hz to 40 kHz ±0.5 dB (Min Gain) Hi-Z Inputs: 10 Hz to 20 kHz ±0.5 dB (Min Gain)
Maximum Input Level
XLR Mic: 9.5 dBu 1/4" Line: 22 dBu 1/4" Hi-Z: 12 dBu	Mic Inputs: +12 dBu Line Inputs: +21 dBu Hi-Z Inputs: +12 dBu
Maximum Output Level
1/4" Line: +16 dBu	Headphone Outputs: +5.46 Vrms (600-Ohm Load)
Headphone Output Power
1/4": 32 mW into 33 Ohms 22 mW into 300 Ohms	223 mW into 30 Ohms (Max) 280 mW into 62 Ohms (Max) 100 mW into 600 Ohms (Max)
Impedance
XLR Mic Inputs: 3 Kilohms 1/4" Line Inputs: 60 Kilohms 1/4" Hi-Z Inputs: 1 Megohms 1/4" Line Outputs: 200 Ohms 1/4" Headphone Outputs: < 50 Ohm	Mic Inputs: 2.8 Kilohms (Balanced) Line Inputs: > 8 Kilohms (Balanced)
Dynamic Range
XLR Mic Inputs: 113 dBA 1/4" Line Inputs: 113 dBA 1/4" Hi-Z Inputs: 112 dBA 1/4" Line Outputs: 120 dB 1/4" Headphone: 112 dB (at 33 Ohms) 115 dB (at 300 Ohms) Digital A/D Converters: 120 dB Digital D/A Converters: 130 dBA	A/D Converters: 120 dB (A-Weighted) D/A Converters: 125.5 dB (A-Weighted) Headphone Outputs: 125.5 dB (A-Weighted)
THD+N
XLR Mic Inputs: -100 dB (at Minimum Gain) 1/4" Line Inputs: -100 dB (at 8 dB Gain) 1/4" Hi-Z Inputs: -80 dB (at Minimum Gain) 1/4" Line Outputs: -100 dB (at Minimum Gain) 1/4" Headphone Outputs: -97 dB (at 33 Ohms) -102 dB (at 300 Ohms) Digital A/D Converters: -110 dB Digital D/A Converters: -115 dB	Mic/Line Inputs: 0.0017% (at 0 dBu) Hi-Z Inputs: 0.1% (at 0 dBu) A/D Converters: < 0.001% (at -1 dBFS) D/A Converters: < 0.0006% (at -1 dBFS) Headphone Outputs: < 0.0009% (at -1 dBFS)
EIN
XLR Mic Inputs: -127 dBu A-Weighted	Mic/Line Inputs: -129 dB A-Weighted

The Focusrite Scarlett Solo USB-C Audio Interface (4th Generation) and the Audient iD4 MKII USB-C Audio Interface both offer impressive specifications but cater to slightly different needs and preferences.
Starting with the frequency response, the Focusrite Scarlett Solo covers a range from 20 Hz to 20 kHz across its XLR mic inputs, 1/4" line inputs, and Hi-Z inputs, ensuring a relatively flat and consistent response throughout the audible spectrum. In comparison, the Audient iD4 MKII extends its frequency response significantly from 10 Hz to 40 kHz for its A/D and D/A converters and mic, line, and headphone outputs, offering a broader range that may appeal to users seeking higher fidelity and more extended frequency reproduction.
When it comes to maximum input levels, the Scarlett Solo provides a maximum of 9.5 dBu for XLR mic inputs and up to 22 dBu for 1/4" line inputs, while the Audient iD4 MKII offers slightly higher maximum levels with +12 dBu for mic inputs and +21 dBu for line inputs. Both interfaces offer the same maximum input level of +12 dBu for Hi-Z inputs. The maximum output level for the Scarlett Solo is +16 dBu for 1/4" line outputs, whereas the Audient provides a substantial +5.46 Vrms for its headphone outputs, indicating a stronger headphone drive capability.
In terms of headphone output power, the Audient iD4 MKII stands out with 223 mW into 30 Ohms, 280 mW into 62 Ohms, and 100 mW into 600 Ohms, which is significantly higher than the Scarlett Solo's 32 mW into 33 Ohms and 22 mW into 300 Ohms. This makes the Audient more capable of driving high-impedance headphones effectively.
The impedance values show that the Focusrite Scarlett Solo's XLR mic inputs have an impedance of 3 Kilohms, 1/4" line inputs at 60 Kilohms, and Hi-Z inputs at 1 Megohm. In comparison, the Audient iD4 MKII has an impedance of 2.8 Kilohms for mic inputs and greater than 8 Kilohms for line inputs, indicating a slightly higher input impedance for line signals.
In terms of dynamic range, the Scarlett Solo offers 113 dBA for its mic and line inputs, 112 dBA for Hi-Z inputs, and an impressive 120 dB for line outputs. The Audient iD4 MKII, however, provides a higher dynamic range of 120 dB for A/D converters and 125.5 dB for D/A converters and headphone outputs, which indicates superior performance in capturing and reproducing audio with lower noise and higher fidelity.
The Total Harmonic Distortion plus Noise (THD+N) figures reveal that the Focusrite Scarlett Solo maintains low distortion levels with -100 dB for mic and line inputs and -80 dB for Hi-Z inputs, while the Audient iD4 MKII has THD+N values of 0.0017% for mic/line inputs and 0.1% for Hi-Z inputs, reflecting its precision in audio handling. Additionally, the Audient's converters show exceptionally low THD+N values of less than 0.001% for A/D and less than 0.0006% for D/A, compared to the Focusrite’s -110 dB and -115 dB respectively.
Lastly, the Equivalent Input Noise (EIN) for the Scarlett Solo’s XLR mic inputs is -127 dBu A-Weighted, while the Audient iD4 MKII outperforms with an EIN of -129 dB A-Weighted for mic/line inputs, offering quieter preamps that are beneficial for recording with sensitive microphones.
Overall, while both interfaces showcase excellent specifications, the Audient iD4 MKII generally offers superior performance in terms of dynamic range, frequency response, and headphone output power, making it a strong contender for users seeking premium audio quality and versatility. The Focusrite Scarlett Solo, on the other hand, provides solid performance with a slightly more limited but still impressive feature set, suitable for users looking for a reliable and straightforward audio interface.

Digital Audio
Sample Rates
44.1 / 48 / 88.2 / 96 / 176.4 / 192 kHz	44.1 / 48 / 88.2 / 96 kHz
Bit Depths
24-Bit	24-Bit
Sync Sources
Internal	Internal

The Focusrite Scarlett Solo USB-C Audio Interface (4th Generation) and the Audient iD4 MKII USB-C Audio Interface both offer high-quality audio performance but cater to slightly different needs in terms of their specifications.
Starting with the sample rates, the Focusrite Scarlett Solo supports a wider range, offering 44.1, 48, 88.2, 96, 176.4, and 192 kHz. In comparison, the Audient iD4 MKII supports only up to 96 kHz, with available rates being 44.1, 48, 88.2, and 96 kHz. This makes the Scarlett Solo more versatile for users who need higher sample rates for their recordings.
Both interfaces offer 24-bit depth, ensuring high-resolution audio recording and playback. However, the Audient iD4 MKII provides additional specifications such as latency details, which are 0.65 ms at 44.1 kHz and 0.31 ms at 96 kHz, dependent on buffer size and input to output routing. This information can be crucial for users who require minimal latency for real-time monitoring and processing.
In terms of sync sources, both interfaces use internal synchronization, which is standard for these types of devices. The Scarlett Solo does not specify a dBFS reference level, whereas the Audient iD4 MKII specifies a dBFS reference level of +12 dBu = 0 dBFS, providing clear information on its reference calibration, which can be useful for professional audio engineers.
In summary, the Focusrite Scarlett Solo USB-C Audio Interface (4th Generation) offers a broader range of sample rates, making it suitable for users needing high sample rate recording capabilities. The Audient iD4 MKII USB-C Audio Interface, while limited to a maximum of 96 kHz sample rate, provides additional technical details like latency and dBFS reference level, which could be advantageous for users who prioritize low latency and precise calibration.

Audio Storage & Playback

Compatibility
OS Compatibility
macOS Windows	macOS 10.11.6 or Later macOS 11.1 or Later Windows 7 or Later 6 or Later iPadOS

The Focusrite Scarlett Solo USB-C Audio Interface (4th Generation) and the Audient iD4 MKII USB-C Audio Interface both offer robust compatibility with macOS and Windows operating systems, but they differ in specific requirements and additional features.
The Focusrite Scarlett Solo (4th Generation) is compatible with both macOS and Windows, and it also supports a mobile app, specifically for iPadOS. This makes it a versatile option for users who might want to integrate it with their iPad for mobile recording sessions or simpler setups.
On the other hand, the Audient iD4 MKII has a more detailed specification list. It supports macOS versions 10.11.6 or later and 11.1 or later, as well as Windows 7 or later. Additionally, it is compatible with iPadOS and extends support to iPhone devices, offering broader mobile device compatibility. The Audient iD4 MKII also specifies processor requirements, which include Intel and Apple M1 for Mac, and a minimum of a 1.6 GHz Intel Core 2 processor for PCs. It requires 1 GB of RAM and needs an available USB-C port along with an included USB cable. An internet connection is necessary for registration and software or driver downloads, ensuring users have access to the latest updates and features.
In summary, while both audio interfaces offer solid compatibility with major operating systems, the Audient iD4 MKII provides more detailed specifications and broader mobile device compatibility, which might be crucial for users with diverse recording setups. The Focusrite Scarlett Solo (4th Generation) keeps things simpler with its straightforward compatibility and specific support for iPadOS.

Power
Power Requirements
USB Bus Power, USB Power Adapter (Not Included)	USB Bus Power

When comparing the power requirements of the Focusrite Scarlett Solo USB-C Audio Interface (4th Generation) and the Audient iD4 MKII USB-C Audio Interface, there are notable differences that may influence a user's choice based on their specific needs and setup.
The Focusrite Scarlett Solo (4th Generation) offers versatility in its power options. It can be powered through USB bus power, which is convenient for users who want to minimize cable clutter and power their interface directly from their computer. Additionally, it can be powered using a USB power adapter, though this adapter is not included with the product. This dual power option provides flexibility for different use cases, such as mobile recording or studio setups where a more stable power source might be preferred. The Scarlett Solo requires an AC/DC power adapter that supplies 5 VDC at 900 mA and has a power consumption of 4.5 W.
In contrast, the Audient iD4 MKII is powered solely through USB bus power. This makes the iD4 MKII a more straightforward option for users who prefer a simplified setup with fewer power sources to manage. The reliance on USB bus power may limit the interface's compatibility with devices that do not provide sufficient power via USB, but for most modern computers, this should not be an issue. The absence of additional power requirements can be seen as a benefit for users seeking a clean and minimalistic setup.
In summary, the Focusrite Scarlett Solo (4th Generation) provides more flexibility with its dual power options, catering to various recording environments and preferences. The Audient iD4 MKII, on the other hand, emphasizes simplicity and ease of use with its single USB bus power requirement, which can be advantageous for users seeking a straightforward and clutter-free setup.

Physical
Dimensions
5.63 x 3.78 x 1.79" / 14.3 x 9.6 x 4.55 cm	5.2 x 4.7 x 2.4" / 13.3 x 12 x 6 cm (Including Controls and Protrusions)
Weight
0.8 lb / 363.0 g	2.2 lb / 1.0 kg

The Focusrite Scarlett Solo USB-C Audio Interface (4th Generation) and the Audient iD4 MKII USB-C Audio Interface both offer high-quality audio performance but differ in various physical aspects and security features.
The Focusrite Scarlett Solo (4th Generation) has dimensions of 5.63 x 3.78 x 1.79 inches (14.3 x 9.6 x 4.55 cm) and weighs 0.8 lb (363.0 g). This compact and lightweight design makes it highly portable, suitable for musicians and producers who need a mobile recording solution.
In contrast, the Audient iD4 MKII measures 5.2 x 4.7 x 2.4 inches (13.3 x 12 x 6 cm, including controls and protrusions) and weighs significantly more at 2.2 lb (1.0 kg). Although it is slightly more cumbersome to transport, its robust build can be advantageous for studio settings where durability is a priority. Moreover, the iD4 MKII features a Kensington Security Slot, providing an anti-theft measure that can be particularly useful in shared or public studio spaces.
Overall, the Scarlett Solo excels in portability due to its smaller size and lighter weight, while the Audient iD4 MKII offers enhanced security and a sturdier build, making it more suitable for fixed studio environments.

Packaging Info
Package Weight
1.305 lb	1.92 lb
Box Dimensions (LxWxH)
7.2 x 6.1 x 2.5"	7.5 x 6 x 3.5"

The Focusrite Scarlett Solo USB-C Audio Interface (4th Generation) and the Audient iD4 MKII USB-C Audio Interface are both popular choices for audio recording, each offering distinct features tailored to different user preferences and needs.
In terms of packaging and physical dimensions, the Focusrite Scarlett Solo 4th Generation is more compact and lightweight. With a package weight of 1.305 lb and box dimensions of 7.2 x 6.1 x 2.5 inches, it is designed for portability and ease of use, making it an excellent choice for musicians and producers who need a reliable yet compact audio interface for on-the-go recording.
On the other hand, the Audient iD4 MKII is slightly heavier and larger, with a package weight of 1.92 lb and box dimensions of 7.5 x 6 x 3.5 inches. While it is still portable, the added weight and size may be indicative of more robust build quality or additional internal components, which could be appealing to users looking for a more durable and possibly feature-rich interface.
Both interfaces connect via USB-C, ensuring fast data transfer rates and compatibility with modern computers and devices. However, the difference in physical dimensions and weight may reflect varying priorities between the two models, with the Focusrite emphasizing portability and the Audient potentially offering enhanced durability or additional features within its slightly larger frame.
Ultimately, the choice between the Focusrite Scarlett Solo USB-C Audio Interface (4th Generation) and the Audient iD4 MKII USB-C Audio Interface may come down to specific user needs regarding portability, build quality, and the overall feature set, which are influenced by the physical design and packaging specifications of each product.