On Tue, 4 Mar 2003, Patrick Shirkey wrote: >> Has anyone tried the dmix plugin thats part of alsa rc8? This looks > I was fscking around with it on Saturday. So far I have managed to use > multiple instances of aplay but other apps like alsaplayer bork at it. I > have yet to figure out why but I think I should probably submit a bug > report somewhere. I've tried it with ecasound and seems to work just fine. One catch is that dmix only supports a certain set of audio format parameters at a time. You can change these via asoundrc (or dmix:x,y), but not at run time. Anyway, with default dmix installation (on top of snd-intel8x0 hw): ecasound -i foo.wav -o alsa,dmix -b:4096 & ecasound -i bar.wav -o alsa,dmix -b:4096 ... plays the two files at the same time. -b:4096 is needed because of the abovementioned reasons. > $ alsaplayer -o alsa -d plug:\'dmix:SLAVE=\"hw:2,1\",RATE=44100\' > track_8.wav [...] > PERIOD_SIZE: 5513 > PERIOD_BYTES: 22052 [...] > error on set_period_size (1024) > Unavailable hw params: Try matching the alsaplayer period_size to the one used by dmix with the "-f 22052" alsaplayer option. PS Opening dmix in non-interleaved mode produces totally garbled output: "ecasound -i foo.wav -f:16,2,44100,n -o alsa,dmix -b:4096" -- http://www.eca.cx Audio software for Linux!
