Le 2020-11-04 18:28, Tanu Kaskinen a écrit :
On Wed, 2020-11-04 at 14:56 +0100, 01ivier@xxxxxxxxxxxxx wrote:
Le 2020-11-04 01:17, Arun Raghavan a écrit :
> On Tue, 3 Nov 2020, at 7:09 PM, 01ivier@xxxxxxxxxxxxx wrote:
> > Le 2020-11-03 23:49, Arun Raghavan a écrit :
> > > On Tue, 3 Nov 2020, at 5:28 PM, 01ivier@xxxxxxxxxxxxx wrote:
> > > > Hello again,
> > > >
> > > > I want to know if there is a way, still in command line, to control
> > > > the
> > > > right and left volumes of an application.
> > > > With Pulseaudio Volume Control, you can click on the lock icon related
> > > > to a launched application, and two sliders appear to do so.
> > > > Is it possible in CLI ?
> > > >
> > > > My goal is to run two applications on the same card, but to assign
> > > > right
> > > > channel for one and left for the other.
> > > >
> > > > Possible complication : the output of my application is in mono and
> > > > with
> > > > Pulseaudio Volume Control I don't get the two sliders if I click on
> > > > the
> > > > lock icon.
> > >
> > > You can use pactl to do this:
> > >
> > > pactl set-sink-input <sink input index> <volume for channel 1>
> > > <volume for channel 2> ...
> > >
> > > You can look up the sink input index and channel map for channel order
> > > with:
> > >
> > > pactl list sink-inputs
> > >
> > > -- Arun
> >
> > Hello Arun and thanks for the quick answer.
> >
> > It's exactly the command I was looking for.
> > Unfortunately, as I thought, it doesn't work in my case because my
> > output is in mono.
> > Here's what I get:
> > Failed to set volume: You tried to set volumes for 2 channels, whereas
> > channel(s) supported = 1
> >
> > I can't change the output of the software.
> > Is there possibly a way to create a virtual stereo output from the
> > mono
>
> Yup, check out module-remap-sink:
> https://www.freedesktop.org/wiki/Software/PulseAudio/Documentation/User/Modules/#module-remap-sink
>
> -- Arun
Thank you,
Your answer is good... I just asked the wrong question... Sorry...
What could help me, in my case, is to remap the mono sink-input (the
ouput of my application) into a stereo one, so that I could control
the
volume of each channel with set-sink-input.
Maybe I missed something but module-remap-sink doesn't like to do it.
I tried to use module-remap-source but "Name or index of the master
source" seems to concern sink listed with "pacmd list-sinks" not
"pactl
list sink-inputs".
Is there a solution to get a stereo sink-input from a mono one ?
There's no way to change the channel map of a sink input. It sounds
like you could load one remap-sink for the left channel and one remap-
sink for the right channel, and point the application to the
appropriate remap-sink.
A BIG THANK YOU !
It perfectly works !
I'm going to try in few days with many more sound cards but is there a
known limit to the number of sink which can be create this way ?
Is 40 something completely crazy to think about ?
Thanks again for your helps.
°1ivier
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