* Jacob Meuser <jake...@sdf.lonestar.org> [2008-12-13 07:02:29 +0000]: > On Sat, Dec 13, 2008 at 03:36:35PM +0900, Colin Didier wrote: > > Hi, > > > > I've a similar problem on my IBM X31 with my USB DAC (a StyleAudio > > Carat-Peridot) using mplayer with the libsndio backend. The audio > > stutters and crackles a lot, but only when playing movies. If I play > > audio files, if I use the sun audio backend, or if I use the integrated > > sound-card of my laptop, everything is fine. > > that is quite interesting. can you show us what "audioctl blocksize" > gives you when the sound is strange?
$ audioctl -f /dev/audioctl1 blocksize blocksize=24000 > > When I plug the USB DAC, I see the following lines in my dmesg: > > > > uaudio0 at uhub2 port 1 configuration 1 interface 0 "Burr-Brown from TI USB > > Audio DAC" rev 1.10/1.00 addr 2 > > uaudio0: audio rev 1.00, 2 mixer controls > > audio1 at uaudio0 > > uhidev0 at uhub2 port 1 configuration 1 interface 2 "Burr-Brown from TI USB > > Audio DAC" rev 1.10/1.00 addr 2 > > uhidev0: iclass 3/0 > > uhid0 at uhidev0: input=1, output=0, feature=0 > > > > So I use mplayer with the following command > > env AUDIODEVICE=/dev/audio1 mplayer my_movie.avi > > > > I tried to use "aucat -l -f /dev/audio1" but it doesn't work and ends > > with the following error: > > > > /dev/audio1: Device not configured > > safile_new: can't open device > > aucat -l runs in full-duplex mode by default. you can change it to > play only with '-m play'. Oh I see. Now "aucat -l -m play -f /dev/audio1" works and there is no more stutters nor crackles in movies. But the audio sounds robotic (even using the integrated sound-card). -- Colin Didier http://cybione.org
