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USB Audio

USB Audio Class 2.0 provides a dramatic improvement over USB Audio Class 1.0 with the addition of 24-bit audio, sample frequencies up to 192kHz and the ability to scale to large numbers of I/O channels.

XMOS has developed a USB Audio Class 2.0 software framework design to work on XS1-L devices. The design provides certified USB 2.0 High Speed device and Audio Class 2.0 device class implementations with configurable digital audio interfaces, peripherals and the ability to integrate audio processing.

Platform Support

USB Audio Class 2.0 is natively supported by Apple OS X version 10.6.4 and above. Support for Windows is provided via XMOS partners, Thesycon, CEntrance and Ploytec. The drivers are configurable and provide support for WDM/Direct X and ASIO 2.1.

Reference Designs

XMOS has developed two reference designs based on the USB Audio Class 2.0 software framework, which is available free of charge and released under a royalty free license. Each design consists of the hardware platform, source code, demonstration drivers and documentation.

Software Framework Key Features

  • Bit-perfect sound with high sample frequencies, up to and including 192kHz
  • Seamless scalability with up to 18 channels of audio
  • Asynchronous USB operation allowing low jitter clocks
  • Exact mix of interfaces you require: I2S, TDM, S/PDIF, ADAT, MIDI
  • Powerful RISC and DSP instructions for complex signal processing algorithms, mixers and level meters
  • Lowest BOM-cost of any solution in the industry
USB Audio 2.0 Reference DesignUSB Audio 2.0 Multichannel Reference Design

USB Audio 2.0 Reference Design

USB Audio 2.0 Multichannel Reference Design

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