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"
--
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