Asynchronous USB

As opposed to the S/PDIF, USB is a bidirectional protocol that makes possible to make a peripheral device (here the D /A converter) act as a master device, and PC as a slave that delivers the data only when and as requested by the DAC. This way, the overall clock performance at the DAC is not related to and limited by the quality of PLL used, or by PC. It is solely determined by the quality of free running oscillator, placed locally in the DAC. Such a solution became lately known as an “asynchronous USB”.

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AYA II

We have the good news for all of you waiting for lower cost Audial DAC – such a unit comes soon. It will be again non oversampling TDA1541A based design which shares the most of design solutions with most advanced The Model.

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