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Music servers and other computer based digital audio technologies.

RE: Cable effects same regardless of USB mode

Yes, the best async implementation will be better than the best adaptive.

The adaptive doesn't have to be as bad as you mention, the local clock does not have to be slaved directly to the frame. It can have a local adjustable clock and a controller that just looks at how full the buffer is and adjusts the local clock so the buffer stays partially filled. If the buffer is many frames long there should not be a direct relationship with jitter on the frame.

BUT as was the topic of my original post in this thread, such jitter CAN wind its way into affecting the jitter on the local clock in both adaptive and async modes.

And yes, the absolute accuracy of the sample clock is determined by the computer in adaptive mode since the local clock has to match the average data rate otherwise the buffer over/underflows.

John S.


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