JohnSwenson;602257 Wrote: > Some people have run a QB-9 with the Touch without any problems at all. > So there has to be something DAC specific, Touch hardware specific or > configuration specific. > > What I would like people to try is different sample rates say 44.1 VS > 48 or 88.2 and 96. That should wind up exercising different crystals in > the DAC. > > With a USB interface the rate data is sent to the DAC is NOT determined > by the audio crystals but by the processor crystal which may not be > given as much care in initial frequency accuracy. The result is that > the data rate might be fairly far off from what it should be and the > feedback loop in the asynchronous interface may not have enough time to > get the computer sending the data at the right rate before the buffer > over/under flows. > > I've been working with some others with async hardware and seeing some > very strange things happening. The feedback loop IS working but > sometimes the data rate gets set to something very bizarre. > Unfortunately I can't get any of this to happen on my Touch so its hard > to debug. > > John S.
Hi John, I've been in communication with the software engineer for my async USB DAC (this one http://www.audiolab.co.uk/ProductDetail.aspx?lang=En&Tab2=8200CDQ), which is also getting the pops/clicks after applying your mod. He is interested in contacting you to help resolve it. Would you like me to put you in touch? Tim -- indypants ------------------------------------------------------------------------ indypants's Profile: http://forums.slimdevices.com/member.php?userid=11608 View this thread: http://forums.slimdevices.com/showthread.php?t=84621 _______________________________________________ Touch mailing list [email protected] http://lists.slimdevices.com/mailman/listinfo/touch
