[alsa-devel] soft vol

[Michel Benoit]

Hello

Now that I have my pcm playback working with aplay with our at91 aSoc
sound driver I would like to control the volume with softvol.

I followed the instructions from
http://alsa.opensrc.org/How_to_use_softvol_to_control_the_master_volume
and I have the following asound.con file in /etc

pcm.!default {
    type             plug
    slave.pcm       "softvol"
}

pcm.softvol {
    type        softvol
    slave {
        pcm     "plughw:0,0"
    }
    control {
        name    "PCM volume"
        card    0
    }
}

When I play a wav file directly to the device it works fine:

# aplay -Dplughw:0,0 Front_Center.wav
Playing WAVE 'Front_Center.wav' : Signed 16 bit Little Endian, Rate
48000 Hz, Mono

but when I try to use the default softvol device I get the following
output (and no sound):

# aplay Front_Center.wav
Playing WAVE 'Front_Center.wav' : Signed 16 bit Little Endian, Rate
48000 Hz, Mono
ALSA sound/core/control.c:1244: unknown ioctl = 0xc2c45512
ALSA sound/core/control.c:1244: unknown ioctl = 0xc2c45512
ALSA sound/core/control.c:1244: unknown ioctl = 0xc2c45512
ALSA sound/core/control.c:1244: unknown ioctl = 0xc2c45512
ALSA sound/core/control.c:1244: unknown ioctl = 0xc2c45512
...

Does anyone have any ideas as to why this is happening?

Michel