If you look earlier in this thread I used a spectrum analyzer to measure the clock going into the DAC chip on a Touch. This doesn't directly measure the jitter, it measures the sidebands caused by the jitter. I could not discern any difference between decoding PCM or FLAC in the Touch. This jitter on this clock was so low the sidebands were below the noise floor of the spectrum analyzer. There might be differences in the sidebands, but the tool I have is not sufficient to measure it. There are tools that are better than this and might be better able to see it but they are VERY expensive and WAY WAY outside of what I can afford! (this was a 30K analyzer that I found used on ebay for $900, its rather rare to find 100K ones like that!)
And yes there is a reclocking flop for the clock that goes into the DAC and and a flop for the S/PDIF stream. I was measuring the DAC clock after the reclocking flop. I think its interesting to note that I DID see significant sidebands on the DAC clock when the headphones were plugged in, which does seem to show that different electrical loads on the board CAN affect the jitter of the clock. John S. -- JohnSwenson ------------------------------------------------------------------------ JohnSwenson's Profile: http://forums.slimdevices.com/member.php?userid=5974 View this thread: http://forums.slimdevices.com/showthread.php?t=71321 _______________________________________________ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/mailman/listinfo/audiophiles
