USB2.0 highspeed class1 soundcard reference design


(Picture shows an eval-board, developed for testing and performance validation only, not available for sale.)


Ploytec GmbH specializes in designing with Microchip products. Visit the Microchip Technology web site for more information by clicking here.


•  USB 2.0 High-Speed (480MHz) Audio / MIDI system
•  Leading edge performance technology based on an affordable, low current chipset
•  32-bit audio processing with two input and two output channels
•  Samplerates: 44.1kHz, 48kHz, 88.2kHz or 96kHz
•  Optionally four inputs and four outputs at max. 48kHz
•  USB2.0 bus- or self-powered power supply mode
•  On-chip audio PLL is synced to USB SOFs for synchronous applications
•  No samplerate conversion for true 1:1 audio
•  Assignable stereo (1/4” TRS) line input and two headphone outputs on the eval board
•  Up to five MIDI input and output ports (fast USB2.0 I/O bulk transfer)
•  Can be slaved to any I2S digital audio interface (CODEC or ADC/DAC as master)
•  Based on the low cost 32-bit high performance Microchip® ATSAMA5D21 microprocessor


•  For Windows (XP, 7, 8 and 10; 32-bit and 64-bit), Mac OS X, Android, Linux and iOS systems
•  Optional Apple MFi certification possible
•  Multi-application mode - simultaneous ASIO and/or WDM playback
•  Low latency Windows ASIO and WDM driver (adjustable in multiple parameters)
•  Software installer and advanced ASIO control panel for Windows


•  Plug&Play on Windows (XP - 10) and Mac OS X (USB class1 audio)
•  Works with any Linux or Android device (USB synchronous design)
•  Firmware updating via USB for programming future updates
•  Direct USB2.0 tripple buffer capture and playback for lowest technically achievable latency
•  Long term design experience with hundreds of thousands of USB Audio units licensed worldwide