Per application volume control with alsa?

Hi
I have alsa sound platform and i am wondering if it is possible to control the volume of each application? I know it is possible with pulseaudio and OSS.

Hi,
below I dump .asoundrc I used some time ago. It allows to play
e.g. two audio streams at the same time with different volume:
aplay -D tnsrch1 someaudio.wav
aplay -D magnet1 otheraudio.wav
The .asoundrc has been created for a sound card with 4 capture and 4 playback channels.
pcm.!default pcm.channel1
pcm.snd_card0 {
type hw
card 0
device 0
ctl.snd_card0 {
type hw
card 0
device 0
pcm.dmix0 {
type dmix
ipc_key 1024
ipc_key_add_uid true
slave.pcm "snd_card0"
slave {
period_time 0
period_size 1024
buffer_size 4096
rate 48000
channels 4
format S32_LE
bindings {
0 0
1 1
2 2
3 3
ctl.dmix0 {
type hw
card 0
device 0
pcm.dsnoop0 {
type dsnoop
ipc_key 2048
ipc_key_add_uid true
slave.pcm "snd_card0"
slave {
period_time 0
period_size 1024
buffer_size 4096
rate 48000
channels 4
bindings {
0 0
1 1
2 2
3 3
ctl.dsnoop0 {
type hw
card 0
device 0
pcm.channel1 {
type asym
playback.pcm {
type plug
slave.pcm "dmix0"
ttable.0.0 1
capture.pcm {
type plug
slave.pcm "dsnoop0"
ttable.0.0 1
ctl.channel1 {
type hw
card 0
device 0
pcm.channel2 {
type asym
playback.pcm {
type plug
slave.pcm "dmix0"
ttable.0.1 1
capture.pcm {
type plug
slave.pcm "dsnoop0"
ttable.0.1 1
ctl.channel2 {
type hw
card 0
device 0
pcm.channel3 {
type asym
playback.pcm {
type plug
slave.pcm "dmix0"
ttable.0.2 1
capture.pcm {
type plug
slave.pcm "dsnoop0"
ttable.0.2 1
ctl.channel3 {
type hw
card 0
device 0
pcm.channel4 {
type asym
playback.pcm {
type plug
slave.pcm "dmix0"
ttable.0.3 1
capture.pcm {
type plug
slave.pcm "dsnoop0"
ttable.0.3 1
ctl.channel4 {
type hw
card 0
device 0
# Rufen port 2110
pcm.rufen {
type plug
slave.pcm "dmix0"
ttable.0.0 1
ttable.0.1 1
ttable.0.2 1
ttable.0.3 1
# Beam-Warnungen port 2001
pcm.beam {
type plug
slave.pcm "dmix0"
ttable.0.0 1
ttable.0.1 1
ttable.0.2 1
ttable.0.3 1
# Magnet-Warnungen port 2003
# Magnet-Warnung channel, with software controls for each channel
# channel "magnet" should be the destination for magnet currentannopuncements
# "Magnet<N>" should be used to switch a channel on or off by setting the
# volume e.g.: amixer set Magnet1 80%
pcm.magnet1 {
type softvol
slave.pcm "channel1"
control {
name "Magnet1"
card 0
pcm.magnet2 {
type softvol
slave.pcm "channel2"
control {
name "Magnet2"
card 0
pcm.magnet3 {
type softvol
slave.pcm "channel3"
control {
name "Magnet3"
card 0
pcm.magnet_multi {
type multi
slaves.a.pcm "magnet1"
slaves.a.channels 1
slaves.b.pcm "magnet2"
slaves.b.channels 1
slaves.c.pcm "magnet3"
slaves.c.channels 1
bindings.0.slave a
bindings.0.channel 0
bindings.1.slave b
bindings.1.channel 0
bindings.2.slave c
bindings.2.channel 0
pcm.magnet {
type plug
slave.pcm "magnet_multi"
ttable.0.0 1
ttable.0.1 1
ttable.0.2 1
# Tunnel search port 2010
# Tunnes search channel, with software controls for each channel
# channel "tnsrch" should be the destination for tunnel search annopuncements
# "Tnsrch<N>" should be used to switch a channel on or offf by setting the
# volume e.g.: amixer set Tnsrch1 0%
pcm.tnsrch1 {
type softvol
slave.pcm "channel1"
control {
name "Tnsrch1"
card 0
pcm.tnsrch2 {
type softvol
slave.pcm "channel2"
control {
name "Tnsrch2"
card 0
pcm.tnsrch3 {
type softvol
slave.pcm "channel3"
control {
name "Tnsrch3"
card 0
pcm.tnsrch_multi {
type multi
slaves.a.pcm "tnsrch1"
slaves.a.channels 1
slaves.b.pcm "tnsrch2"
slaves.b.channels 1
slaves.c.pcm "tnsrch3"
slaves.c.channels 1
bindings.0.slave a
bindings.0.channel 0
bindings.1.slave b
bindings.1.channel 0
bindings.2.slave c
bindings.2.channel 0
pcm.tnsrch {
type plug
slave.pcm "tnsrch_multi"
ttable.0.0 1
ttable.0.1 1
ttable.0.2 1

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nitramluap wrote:
It IS possible, actually and its omission makes no sense.
Yes, it is possible but it isn't desirable. Here's why:
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Per application volume control with alsa?

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