[pulseaudio-discuss] WG: AW: module-sine for generating two independent sine wave signals on the left and right output of a sound device

[S.C.T.N Gmbh]

Yes I can confirm that:

Pactl unload-module <index> 
stops the sine output on both channels. 

 

But in

pactl list modules short

the module<index> has disappeared while the other module-sine is still
there.

 

Could it be related to t he other modules that are loaded after boot? Here
is a list of all modules that are loaded in my case by default:

pi at TEST:~ $ pactl list modules short

0       module-device-restore

1       module-stream-restore

2       module-card-restore

3       module-augment-properties

4       module-switch-on-port-available

5       module-udev-detect

6       module-alsa-card        device_id="0" name="platform-soc_audio"
card_name="alsa_card.platform-soc_audio" namereg_fail=false tsched=yes
fixed_latency_range=no ignore_dB=no deferred_volume=yes use_ucm=yes
card_properties="module-udev-detect.discovered=1"

7       module-native-protocol-unix

8       module-default-device-restore

9       module-rescue-streams

10      module-always-sink

11      module-intended-roles

12      module-suspend-on-idle

13      module-console-kit

14      module-systemd-login

15      module-position-event-sounds

16      module-role-cork

17      module-filter-heuristics

18      module-filter-apply

 

Annother hitch is that it takes quite an amount of time after unloading
before module-sine can be reloaded again (roughly 10secs).
Is there any flag or indication that the unloading has completed so that the
module can be reloaded again?

Kind regards




 

Von: Georg Chini [mailto:georg at chini.tk] 
Gesendet: Samstag, 11. November 2017 13:37
An: S.C.T.N Gmbh
Cc: General PulseAudio Discussion
Betreff: Re: AW: [pulseaudio-discuss] module-sine for generating two
independent sine wave signals on the left and right output of a sound device

 

On 11.11.2017 13:29, S.C.T.N Gmbh wrote:

Perfect, it works. Thank you a lot.

Only one problem remains: I don't know how to stop the two modules-sine
independently:

I use:



To define the left channel:
pactl load-module module-remap-sink sink_name=left_mono
master=alsa_output.platform-soc_audio.analog-stereo channels=1
master_channel_map=front-left channel_map=front-left remix=no

24

 

To define the right channel:

pactl load-module module-remap-sink sink_name=right_mono
master=alsa_output.platform-soc_audio.analog-stereo channels=1
master_channel_map=front-right channel_map=front-right remix=no

25

 

To start sine on the left:
pactl load-module module-sine sink=left_mono frequency=921

26

 

To start sine on the right:

pactl load-module module-sine sink=right_mono frequency=821

27

 

I dont know how to stop one of the module-sine while leaving the other one
on.

The CLI says to specify a module index or a module name. I suppose the index
ist he number that is displayed after entering the command? (In the above
example 26,27)

But when I use e.g. 

Pactl unload-module 

Both channels are stopped.





I added the list again. Yes, using the module index like "pactl
unload-module 26" should unload
only the single sine module. If you use the name, all instances of the
module are unloaded.
Doesn't that work for you? That would be a bug.
You can also see the module index with "pactl list modules short". 








 

Von: Georg Chini [mailto:georg at chini.tk] 
Gesendet: Samstag, 11. November 2017 12:32
An: General PulseAudio Discussion; S.C.T.N Gmbh
Betreff: Re: [pulseaudio-discuss] module-sine for generating two independent
sine wave signals on the left and right output of a sound device

 

On 11.11.2017 09:50, S.C.T.N Gmbh wrote:

I want to use MODULE-SINE to produce two independent sine wave signals with
different frequencies on the left and right output of a sound card:

By using :

pactl load-module module-sine frequency=1000 

I get of course the same 1000Hz signal on both channels and

pactl unload-module module-sine stops both of them.

So the question is whether there is a configuration to start and stop left
and right channel independently and to run them with different frequencies?

 

Thank you in advance

Sporex

 

You can use module-remap-sink to create independent sinks for each channel.
Then you can use module-sine on the remapped sinks.

Regards
             Georg

 

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