USB2.0 soundcard 192kHz 4in / 4out reference design

Ploytec JCT2.0 prototype board


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 4 input and 4 output channels
•  Optionally up to 8 input and 8 output channels at max. 96kHz
•  Optionally up to 16 input and 16 output channels at max. 48kHz
•  Samplerates: 44.1kHz, 48kHz, 88.2kHz, 96kHz, 176.4kHz or 192kHz
•  USB2.0 (3.0) bus- or self-powered power supply mode
•  Sensationally low jitter (<10mUI) due to FMC™ (Fixed-Master-Clock) technology
•  No samplerate conversion or clock recovery for true 1:1 audio
•  Assignable stereo (1/4” TRS) line input and headphone output on the eval board
•  Up to four MIDI input and output ports (fast USB2.0 I/O bulk transfer)
•  Optional USB3.0 extension possible via companion chip
•  Can be slaved to any I2S digital audio interface (CODEC or DIR/DIT as master)
•  Based on the low cost (<EUR 2.00) 32-bit high performance Microchip® ATSAM3U1C microcontroller


•  For Windows (XP, 7, 8 and 10; 32-bit and 64-bit), Mac OS X and iOS systems
•  Optional Apple MFi certification possible
•  Multi-application mode - simultaneous ASIO and/or WDM playback
•  Extremely low latency Windows ASIO and WDM driver (adjustable in multiple parameters)
•  Default USB interrupt mode transactions on Windows for better performance
•  Fully USB Audio Class 2.0 compliant (isoc asynchronous mode)
•  Optionally compatible with the Windows 10 Fall Creators Update's Class 2.0 support
•  Software installer and advanced ASIO control panel for Windows


•  Firmware updating via USB for programming future updates
•  Handy 4x4 audiomixer in firmware (low latency monitoring)
•  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