>> I've tried S24_3LE, S24LE, S24_BE, S24_3BE, FLOAT_LE, and FLOAT_BE. >> None of them produce sound except for S24_3LE. S16_LE works, but >> stills suffers from the static problem. Is there another format I >> should try? > > try the "U" (unsigned) ones... i.e. U16_LE, U24_3LE, etc. > >> > BTW: what if you remove everything from asound.conf and just play to >> > "plughw:0,0" as per default? >> >> I did that by removing /etc/asound.conf and doing 'aplay file.wav', >> but it produces the same static problem. > > that's strange! > > So how come that you don't get 'em with mpd?! In mpd I specify oss instead of alsa. If I specify alsa and involve dmix, I get static in mpd too. > what is it using for output? > >> I really think dmix is not using the specified samplerate or speexrate. > > again, I believe that your problem is completely unrelated to the > resampling algorithm used. > > For the sake of curiosity I've tried them all and can guarantee you > that all of them produces quite acceptable results. IME *none* of the > ALSA resampling algorithms (not even the worst ones) ever produce any > "static" (or other obvious & nasty artifacts for that matter). Well, there is a blog post under "A little hint for hda ALSA users" which says: "if you own an hda-based soundcard and you head crackling sound while playing mp3s or similar, the problem is probably due to the bad samplerate conversion from 44100 to 48000." http://blog.flameeyes.eu/tag/alsa/page/2 My DAC isn't hda but I think this demonstrates that dmix's default resampling algorithm can produce audible artifacts. He says switching dmix to the "samplerate" resampler fixes it, and I've defined that, but I'm not sure it's taking affect. > The perceived sound quality may be different - and indeed it is if > you have an audio system which is good enough to notice - but that's > all. > > Your problem can NOT be due to a poor resampling algorithm: it must > be a plain BUG somewhere! > > For the moment I urge you to forget about resampling algorithms and > seek for the real source of your problems instead. > > Trying to keep things as simple as possible (that is, all defaults, > no resampling) to make debugging easier. > > Only once you've got the default config to work properly you may start > experimenting with more sophisticated options. That sounds good, but what else can I try? - Grant ------------------------------------------------------------------------------ Crystal Reports - New Free Runtime and 30 Day Trial Check out the new simplified licensing option that enables unlimited royalty-free distribution of the report engine for externally facing server and web deployment. http://p.sf.net/sfu/businessobjects _______________________________________________ Alsa-user mailing list Alsa-user@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/alsa-user
