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n0rv

Member

Registered: 2012-02-27

Posts: 50

Mute speakers selectively when plugging in headphones

I try to make some interesting sound config.
At this time, when I plug headphones to my PC, speakers mute. I want to change this behaviour and mute applications selectively: everything should be muted, but mplayer and/or mpd not.
How to make this working? It's even possible? I'm almost sure that asound.conf is not a right place to start.

My actual /etc/asound.conf

# the sound card
pcm.real {
  type hw
    card 0
    device 0
}

# the ipc stuff is needed for permissions, etc.
pcm.dmixer {
  type dmix
    ipc_key 1024
    ipc_perm 0666
    slave.pcm "real"
    slave {
      period_time 0
        period_size 1024
        buffer_size 8192
        rate 44100  
    }
  bindings {
    0 0
      1 1 
  }
}

ctl.dmixer {
  type hw
    card 0
}

# software volume
pcm.softvol {
  type softvol
    slave.pcm "dmixer"
    control {
      name "Software"
        card 0
    }
}
# mpd volume control
pcm.mpdvol {
  type softvol
    slave.pcm "dmixer"
    control {
      name "MPD"
        card 0
    }
}
# ctrl for mpd volume
ctl.mpdvol {
  type hw
    card 0
}
# MPlayer volume control
pcm.mplayervol {
  type softvol
    slave.pcm "dmixer"
    control {
      name "MPlayer"
        card 0
    }
}
# ctrl for MPlayer volume
ctl.mplayervol {
  type hw
    card 0
}

# input
pcm.input {
  type dsnoop
    ipc_key 3129398
    ipc_key_add_uid false
    ipc_perm 0660
    slave.pcm "810"
}

# duplex device
pcm.duplex {
  type asym
    playback.pcm "softvol"
    capture.pcm "input"
}

# default devices
pcm.!default {
  type plug
    slave.pcm "duplex"
}

# for oss devices
pcm.dsp0 {
  type plug
    slave.pcm "duplex"
}

ctl.equal {
	type equal;
}

pcm.plugequal {
    type equal;
	slave.pcm "dmixer";
}

pcm.equal{
    type plug;
    slave.pcm plugequal;
}

Some hardware info:

$ lspci -k | egrep -iA2 Audio
00:1b.0 Audio device: Intel Corporation 82801I (ICH9 Family) HD Audio Controller (rev 02)
	Subsystem: ASUSTeK Computer Inc. P5K PRO Motherboard
	Kernel driver in use: snd_hda_intel

Last edited by n0rv (2013-06-29 15:58:56)