jkeny wrote: > Well as a measureist/objectivist you should have no problem with the > 8KHz & harmonics spikes as only 8Khz & 16KHz are within the audible band > & they are considered to be far, far below audibility by those who claim > to want to see evidence of audible differences on the DAC analogue outs > for "proof" that such a device makes an audible difference. > > My position on it as an "unwanted added signal" is that if it turns out > to be the result of a cleaner, better timed,less jittery USB signal at > the input to the DAC & this is how USB receivers handle an in-spec usb > signal, then the DAC needs to deal with this USb receiver output in a > correct manner & find a way to eliminate it, if it bothers some. But, if > it's below audibility, according to many, why would they bother? > > Of course I could be wrong in my interpretation of these 8KHz spurs - > more testing is required, I reckon
John, first things first, while you could be right that the 8kHz tone (+16kHz harmonic) is related to the USB2 PHY, where is the measurement that this is so? Amir could still be correct that these are +/-4kHz sidebands from his jitter test couldn't he? I didn't see him measuring a 11kHz tone or even show whether digital silence results in this 8kHz tone. Perhaps I missed this in the long thread... Archimago's Musings: (archimago.blogspot.com) A 'more objective' audiophile blog. ------------------------------------------------------------------------ Archimago's Profile: http://forums.slimdevices.com/member.php?userid=2207 View this thread: http://forums.slimdevices.com/showthread.php?t=104340 _______________________________________________ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/mailman/listinfo/audiophiles
