USB cable hype

Axle, cable bad enough to corrupt bits would be disaster
since each frame contains checksum and would be dropped. As
I understand it each frame is delivered every millisecond
and starts with unique bit sequence signifying start of the
frame (SOF) followed by music samples (about 2x44
for redbook playback) and then followed by the checksum.
When even one bit is wrong checksum won't match and DAC will
drop whole frame (2x44 music samples) since it does not
resend frames. On the other hand I see possibility of
vendor specific design that resends frames eliminating bit
errors completely.

Axle,

Have a look at this new thread. "Dual Headed USB hookup?"

You may find it interesting. I've never seen a USB cable set up like this before.

Kijanki, Your point about checksums is interesting. Let's say that a packet is dropped. What would take the place of the dropped packet? Would it be that the contents of previous packet are duplicated? Dropped packets are problematic regarless of how they are manged. The only good solution is o resend the packet.

With a buffer large enough for several minutes of audio, there would be ample time to resend packets. Does USB audio comply fully to USB standard specifications? The answer to that question would go a long way. Thanks.

Zd542, I have seen dual headed USB cables with one connector dedicated to power and the other to signal. But I am not sure about which thread you mean. I searched "Dual Headed USB hookup" in Audiodon and nothing came up.

Axle, I'm assuming, that without resending it would be 1ms gap. Not bad if it happens once but can sound pretty bad if frames are dropped often. I found some info and interesting computer audio FAQ site:
http://www.thewelltemperedcomputer.com/KB/USB.html