I just wanted to clarify, that this isn't a crackle in a latency sense i.e clicks and pops. This is a long fairly consistent crackling sound that stops when i stop playback, the audio i'm trying to playback is otherwise completely clear, so the sound is in addition to playback. It only occurs when i'm using dmix.
Hope this helps shed a little more light on the subject, maybe someone else has experienced something similar? Dan On Thursday 06 May 2004 17:49, dan wrote: > Hello, > > I'm trying to set up my M-Audio Delta 66 using the alsa drivers (ice1712) > to enable it to play back from more than one sound source at the same time, > mainly for playback via XMMS whilst still hearing sound notifications on > the PSI jabber client. > > I'm running Debian unstable, with kernel 2.6.5, and the alsa and ice1712 > drivers are compiled as modules, i have enabled; > > Advanced Linux Sound Architecture > Sequencer Support > Sequencer Dummy Client > OSS Mixer API > OSS PCM (digital audio) API > OSS Sequencer API > RTC Timer Support > PCI Devices > ICEnsemble ICE1712 (Envy24) > > My modprobe.conf options are as follows; > > alias char-major-116 snd > alias char-major-14 soundcore > options snd major=116 cards_limit=4 > alias sound-service-0-0 snd-mixer-oss > alias sound-service-0-1 snd-seq-oss > alias sound-service-0-3 snd-pcm-oss > alias sound-service-0-8 snd-seq-oss > alias sound-service-0-12 snd-pcm-oss > alias /dev/dsp* snd-pcm-oss > alias snd-card-0 snd-ice1712 > alias snd-slot-0 snd-card-0 > alias sound-slot-0 snd-slot-0 > > Previously, before following various documentation on > http://alsa.opensrc.org, i was running without an ~/.asoundrc, which worked > fine except only one application could access the soundcard at any one > time, so i reluctantly tried arts but ran into various problems (including > instability) and the constant need to disable it for various apps and of > course for actual recording. So i looked into running dmix, which appeared > to achieve all of my goals, except from the offending problem, the loud > crackle on playback. This is my ~/.asoundrc; > > pcm.dmixer { > type dmix > ipc_key 1024 > slave { > pcm "hw:0,0" > period_time 0 > period_size 1024 > buffer_size 4096 > rate 44100 > } > bindings.0 0 > bindings.1 1 > } > > pcm.!default { > type plug > slave.pcm "dmixer" > } > > Please note the buffer size is less than 6553. I have tried increasing the > buffer size (in powers of 2) and likewise the period time and size, but to > no avail. The crackle is also evident on other software, such as xine. I > have changed the sound player in PSI from play to dplay to ensure i'm using > an alsa compatible program, and i can happily say that in this scenario, > apart from the crackle, i am able playback from more than one source at the > same time. > > Any help would be greatly appreciated! I hope i have provided enough > information. > > Many thanks, > > Dan Halson > > > ------------------------------------------------------- > This SF.Net email is sponsored by Sleepycat Software > Learn developer strategies Cisco, Motorola, Ericsson & Lucent use to > deliver higher performing products faster, at low TCO. > http://www.sleepycat.com/telcomwpreg.php?From=osdnemail3 > _______________________________________________ > Alsa-user mailing list > [EMAIL PROTECTED] > https://lists.sourceforge.net/lists/listinfo/alsa-user ------------------------------------------------------- This SF.Net email is sponsored by Sleepycat Software Learn developer strategies Cisco, Motorola, Ericsson & Lucent use to deliver higher performing products faster, at low TCO. http://www.sleepycat.com/telcomwpreg.php?From=osdnemail3 _______________________________________________ Alsa-user mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/alsa-user
