JohnSwenson;664319 Wrote: > Hi Klaus, I did try nrpacks, it makes no difference for xruns, but does > significantly affect sound quality. > > There are several parameters avaivable for the basic usb driver but I > want to sit down with the source code and see what they do. > > The xruns do NOT seem to be in the alsa space, I'm not getting any alsa > log messages about any xruns until I get buffer settings very bad. I > think its something with the generic USB driver/hardware. > > Another interesting tidbit is the firmware used. With an early 7.5.1 > firmware I get LOTS of xruns with 88.2 (this is all aplay), but a > recent 7.5.1 has almost no xruns (still a few about two per song). This > is with everything else setup exactly the same. With 96 the early and > recent 7.5.1 give about the same results. SOMETHING in the firmware > changed which caused major differences in xruns. > > John S.
I played with nrpacks from 2007 onwards. At those days playing around with nrpacks made a huge difference. ;) During those days I also changed the kernel timer to 10khz instead of 1000Hz, which made a big difference. Within snd-usb-audio I also lowered the buffers which were set to 1000ms if I recall it correctly. Anyhow: I read that reasonable USB2.0 Alsa compliance starts with 1.0.23. Current Alsa - almost a year old - is 1.0.24. We're at 1.0.16 with the Touch. One more idea: Have you played around with the Alsa period parameter? You can change it in the known files. It is set to 2 by default. That's pretty aggressive. You might want to increase that and lower the buffersize. I don't have a DAC for testing it myself. Cheers -- soundcheck ::: ' Touch Toolbox 2.0 and more' (http://soundcheck-audio.blogspot.com) ::: by soundcheck ------------------------------------------------------------------------ soundcheck's Profile: http://forums.slimdevices.com/member.php?userid=34383 View this thread: http://forums.slimdevices.com/showthread.php?t=82110 _______________________________________________ Touch mailing list [email protected] http://lists.slimdevices.com/mailman/listinfo/touch
