Steve N., are you saying that the "noise" carried by the USB cable corrupts the bits that the "receiving system" decodes, or are you saying the noise enters in to the "Receiving system", bypasses the decoding function (because the USB interface only accepts bits), and then rejoins the signal at some point and ultimately corrupts the analog signal being output? If the latter, doesn't any "receiving system" fall prey to this pitfall from any media source?
