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Corrections

Kurt,

Really to go through the specs would take months to do as you need to look at more than what you did and really none of that may have anything to do with cable differences.

Your math is a little wrong...

16 bit data requires 4 byte samples 2 left, 2 right at 1ms frame rate that is 192 bytes per frame or 192K bytes or 1.536MBps (bits per second).

There are a couple of things to know. First USB 2.0 can be high speed or full speed. 100ma was 1.0, 1.1 was 500ma, most Apple ports can supply 800ma.

In Full Speed the largest frame is 1023, in high speed 1024. Therefore if we back math this at full speed and say 24 bit samples or 6 bytes per stereo sample we get.

1023/6*1000 = 170.6KHz sample rate max for Full Speed.

With High Speed and Micro Frames you can go basically 8x faster and that is what gives us 24(32)/192 capabilities.

Again as far as cables concerned I have not seen anything that suggests why cables make a difference in sound. I just don't think we have enough out of the box thoughts on this.

Thanks
Gordon
J. Gordon Rankin

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