Phil Leigh;348964 Wrote: > Thanks Nick and Opaqueice... I'll have another play tomorrow. I think > the analogue output stage of the DAC is making the waveform the shape > it is - I'll check out the scope with a signal generator as soon as I > can get it from the loft... but I think the scope is OK. > I may also delve into the DAC itself to see if there are any other > intresting traces to be had. > Cheers > Phil
Try scoping the analogue outs of the squeezebox/TP playing that same square wave. If it looks better, your DAC is broken. If it looks the same, your scope is broken. -Something- is adding very large amounts of harmonic distortion to that signal. I don't have a scope, but I tried recording a 1KHz squarewave coming out of the SB3 using my laptop's soundcard. It looks much better than your scope trave - it's limited by the resolution of the soundcard's A->D, but at 96kHz it looks quite flat, with the expected Gibbs ringing and none of the 2nd order harmonic distortion yours has. -- opaqueice ------------------------------------------------------------------------ opaqueice's Profile: http://forums.slimdevices.com/member.php?userid=4234 View this thread: http://forums.slimdevices.com/showthread.php?t=53345 _______________________________________________ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
