jkeny wrote: > Amir, BE718 insist that DAC analogue output is the only place to do > measurements & have shown higher amplitude 8KHz spikes (& their > harmonics). This is exactly what is to be expected when the jitter of > the USB frames & microframes is reduced. Microframe timing of 125uS > gives rise to a frequency of 8KHz (& harmonics) when the logic gates in > the USB receiver fire at this interval causing a ground noise spike or > logic induced modulation (LIM) as it is known by.
So cleaning up the USB timing results in more 8 KHz noise? > I wouldn't be surprised if the next demand will be that we don't > actually listen to the DAC output so the analogue signal should be > measured further downstream - hell measurements should only be measured > from the speaker as that is what we listen to, right? I guess that by that logic, we should measure at the neurons in our brain. "To try to judge the real from the false will always be hard. In this fast-growing art of 'high fidelity' the quackery will bear a solid gilt edge that will fool many people" - Paul W Klipsch, 1953 ------------------------------------------------------------------------ Julf's Profile: http://forums.slimdevices.com/member.php?userid=42050 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
