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USB audio kit achieves sub-3ms roundtrip latency

Posted: 30 Nov 2009 ?? ?Print Version ?Bookmark and Share

Keywords:USB Audio 2.0? reference design? processor?


XMOS has developed a USB Audio 2.0 reference design that enables standard computer-based systems to deliver bit-perfect prosumer quality sound.

The XMOS XS1-L1 event driven processor-based software solution is designed to support hi-speed USB Audio 2.0 connectivity and up to six input and six output audio channels at 24bit resolution and a sample rate of 192kHz. XMOS L2 and G4 devices support higher audio channel counts.

The reference design's unique asynchronous clocking mode achieves sub-3ms roundtrip latency and is a key factor in the reproduction of high-quality audio which makes it suitable for live music playback. The credit card-sized reference design board suits the development of speakers, home theatre systems, sound cards, musical instruments and professional audio equipment.

Gordon Rankin, chief scientist at Wavelength Audio, a designer of USB DACs said, "I'm glad to see XMOS producing a USB Audio 2.0 solution that's clearly focused on achieving excellent sound quality. In particular, its asynchronous mode is a vital ingredient in the reduction of digital audio jitter which results in superior sound reproduction."

James Foster, CEO of XMOS said, "Streamed PC audio delivery and replay has rapidly become the norm, and it's essential that the industry continues to design systems capable of producing the audio quality levels that discerning consumers and professionals have come to expect."

The software-defined workflow of the reference design makes it readily adaptable and customizable to handle specific interfacing requirements, DSP algorithms for audio enhancements and custom 'front-of-box' peripherals. To reduce development time, XMOS' ready-made library of software components already includes I?S, S/PDIF and many other interfaces.

The design works with the Mac OS-X 10.6 (Snow Leopard) Audio 2.0 native class driver, and XMOS has teamed with Thesycon to provide Audio 2.0 Class driver support for Windows. The XMOS USB Audio 2.0 reference design kit is available now and priced at $149.

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