Apesbrain wrote: > Thanks, I've never used the USB interface. Doesn't the Touch buffer > incoming data? Why the need for "syncronization"?
Yes, the Touch does buffers the data. The USB interface is a different layer. Triode explains the USB transport timings. Triode wrote: > Yes it should alter as it's a feedback mechanism - this is what "async" > usb is all about. The dac tells the transport how fast to go and the > transport changes its rate as told. The critical thing is that the > crystals in dac and player will be at slightly different frequencies. > There is a buffer in the dac, so all that is required is that the dac > tells the transport to slow down or speed up to keep the buffer half > full - this is what is happening with the different rates you see. The > fact it is changing means it is working in async mode. > > It's interesting how different dac manufacturers have implemented these > changes differently - my audiolab for instance alters the frequency by > 100Hz or more between the go faster and go slower message. Your dac > appears do adjust on a more fine grain manner. However the bit that > matters is that it is updating. Quoted from 'here' (https://forums.slimdevices.com/showthread.php?93310-Async-USB-Dac-Experiments-testers-wanted&p=696795&viewfull=1#post696795). Ralphy *1*-Touch, *5*-Classics, *3*-Booms, *1*-UE Radio 'Squeezebox client builds' (https://sourceforge.net/projects/lmsclients/files/) 'donations' (https://www.paypal.com/cgi-bin/webscr?cmd=_donations&business=LL5P6365KQEXN&lc=CA&item_name=Squeezebox%20client%20builds¤cy_code=USD&bn=PP%2dDonationsBF%3abtn_donate_SM%2egif%3aNonHosted) always appreciated. ------------------------------------------------------------------------ ralphy's Profile: http://forums.slimdevices.com/member.php?userid=3484 View this thread: http://forums.slimdevices.com/showthread.php?t=110880 _______________________________________________ Touch mailing list [email protected] http://lists.slimdevices.com/mailman/listinfo/touch
