5 ms·
That may be true, but this is a USB cable and (IIRC) USB is packet-based. There is no way that clock jitter can influence the final result. (edit: upvoted for
by paol 13y ago
That may be true, but this is a USB cable and (IIRC) USB is packet-based. There is no way that clock jitter can influence the final result.
(edit: upvoted for the informative link, in any case)
- rayiner 13y agoUSB is packet based, but USB Audio still recovers the clock signal from the timing of bits on the wire. This recovered clock is used to drive the DAC, which produces the final analog waveform.
- paol 13y agoInteresting! Just read up a little on that, and from here http://www.edn.com/design/consumer/4376143/2/Fundamentals-of-USB-Audio http://www.edn.com/design/consumer/4376143/2/Fundamentals-of... it appears that is only one of several options (and acknowledged as a bad choice)
- rayiner 13y agoIt is only one of several options, but it's also the most common one. It's a lot more expensive to build a device that operates in isochronous. You need to have a local buffer, extra compute capability, a high-quality local clock, etc.