At Fri, 11 May 2007 12:36:01 +0200, Michel Benoit wrote: > > 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? This should be SNDRV_CTL_IOCTL_ELEM_READ. Could you check which number this ioctl is in the kernel code? e.g. try printk("0x%x\n", SNDRV_CTL_IOCTL_ELEM_READ) in kernel and in alsa-lib, too. Takashi _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
