Ingo Müller schrieb:
> Hi!
>
> Did you see the softvol master volume howto? If you don't get it to work
> in another way, maybe this one may help you:
>
> http://alsa.opensrc.org/How_to_use_softvol_to_control_the_master_volume
Yes, I tried, it didn't work.
> If you have any questions or suggestions for the howto, please let me know.
OK, so I followed the guide:
$ aplay -L
default:CARD=V8237
VIA 8237, VIA 8237
Default Audio Device
front:CARD=V8237,DEV=0
VIA 8237, VIA 8237
Front speakers
surround40:CARD=V8237,DEV=0
VIA 8237, VIA 8237
4.0 Surround output to Front and Rear speakers
surround41:CARD=V8237,DEV=0
VIA 8237, VIA 8237
4.1 Surround output to Front, Rear and Subwoofer speakers
surround50:CARD=V8237,DEV=0
VIA 8237, VIA 8237
5.0 Surround output to Front, Center and Rear speakers
surround51:CARD=V8237,DEV=0
VIA 8237, VIA 8237
5.1 Surround output to Front, Center, Rear and Subwoofer speakers
iec958:CARD=V8237,DEV=0
VIA 8237, VIA 8237
IEC958 (S/PDIF) Digital Audio Output
null
Discard all samples (playback) or generate zero samples (capture)
It wasn't clear for me what is meant by:
"To test this device, use:
speaker-test -D<device name> -c<channel number> -twav"
Especially, what is the <device>, and the <channel number>.
I tried "CARD=V8237", "VIA 8237", and in the end, "default" and "front"
worked, combined with a channel of 0 or 1.
Perhaps it needs some clarification.
Then, I began to create .asoundrc:
$ cat .asoundrc
pcm.softvol {
type softvol
slave {
pcm "default"
}
control {
name "testdevice"
card 0
}
}
Running speaker-test confirmed I get some audio:
$ speaker-test -Dsoftvol -c0 -twav
speaker-test 1.0.14rc2
Playback device is softvol
Stream parameters are 48000Hz, S16_LE, 1 channels
WAV file(s)
Rate set to 48000Hz (requested 48000Hz)
Buffer size range from 32 to 32768
Period size range from 16 to 16384
Using max buffer size 32768
Periods = 4
was set period_size = 8192
was set buffer_size = 32768
0 - Front Left
Time per period = 0,867245
0 - Front Left
Then, I followed the "Make applications use it" part of the guide, and
this is where I got stuck - to the bottom of .asoundrc I added:
pcm.!default {
type plug
slave.pcm "softvol"
}
Now, it doesn't work anymore:
$ speaker-test -Dsoftvol -c0 -twav
speaker-test 1.0.14rc2
Playback device is softvol
Stream parameters are 48000Hz, S16_LE, 1 channels
WAV file(s)
ALSA lib conf.c:4036:(snd_config_check_hop) Too many definition levels
(looped?)
Playback open error: -22,Invalid argument
ALSA lib conf.c:4036:(snd_config_check_hop) Too many definition levels
(looped?)
Playback open error: -22,Invalid argument
ALSA lib conf.c:4036:(snd_config_check_hop) Too many definition levels
(looped?)
Playback open error: -22,Invalid argument
Google didn't reveal much information about "Too many definition levels".
My whole .asoundrc looks like that:
$ cat .asoundrc
pcm.softvol {
type softvol
slave {
pcm "default"
}
control {
name "testdevice"
card 0
}
}
pcm.!default {
type plug
slave.pcm "softvol"
}
So still, I don't know how to configure the audio device so that it
works properly (including regulating volume using master fader.
--
Tomasz Chmielewski
http://wpkg.org
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