Hello,
the only way for me to get surround sound from my Mac Mini is to use its
spdif interface and an external ac3 decoder, but this leads to various
problems (e.g. no volume control from my pc anymore). My idea was the
following:
application--->dmix--->upmix--->softvol--->a52--->external a52 decoder
Till know I have this setup working:
application--->softvol--->upmix--->a52--->external decoder
But there are two problems with this setup:
0. without dmix I cannot share the sound card which is a big problem!
1. dmix refuses to work with the a52 plugin as its slave
2. all xine-lib based apps have problems with the upmix plugin (I don't
know how to explain - it sound's like a tinkling and stuttering).
Playing medias with "native" ac3 sound is also fine with xine (e.g.
DVDs, Dolby or THX trailers, but not AC3 from digital tv/vdr). Sound
from mplayer is fine all the time.
Is there any way to make dmix work with a52 as slave?
Here's my asound.conf
pcm.swac3 {
type softvol
slave {
pcm "upmix51" #redirect the output to dmix (instead of
"hw:0,0")
}
control {
name "PCM" #override the PCM slider to set the softvol
volume level globally
card 0
}
}
pcm.upmix51 {
type upmix
channels 6
slave {
pcm "ac3plug"
}
}
pcm.dmixer { # THIS DOES NOT WORK!!!
type dmix
ipc_key 12345
slave {
pcm "swac3"
rate 48000
format S16_LE
channels 6
period_time 0
period_size 1024
buffer_size 8192
}
}
pcm.ac3plug {
type a52
channels 6
rate 48000
}
pcm.!surround51 { # NOT REALLY USED
type plug
slave.pcm "swac3"
}
Best Regards,
Michael
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