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RE: USB clocking for 44.1k?

Posted by Thorsten (M) on March 5, 2017 at 20:30:32

In Reply to: RE: USB clocking for 44.1k? posted by Dynobot on March 4, 2017 at 08:47:39:

Hi,

> Is it possible to slave the USB Bit-Bucket clock and the Audio
> Bit-Bucket clock to 'one' master clock?

That is called "Asynchronous USB Audio".

It actually does not directly slave the clocks (that is not possible in that sense), but it makes sure the audio clocks determine audio timing.

Modern mixed signal system routinely have multiple clocks and the wide variety of clocks needed does not make synchronisation across all clocks feasible.

The important part then becomes to make sure each individual clock is correct for the job and performs adequately and that the audio conversion uses one high quality clock after a short memory buffer (to handle any data flow control).

Thor

At 20 bits, you are on the verge of dynamic range covering fly-farts-at-20-feet to intolerable pain. Really, what more could we need?

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