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

[Georg Chini]

On 11.11.2017 14:58, S.C.T.N Gmbh wrote:

please don't top post on that list.

> 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.
>

This definitely should not happen. I'll investigate and see if I can
reproduce the issue.

> 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).
>

This also sounds weird. Same comment as above.

> 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 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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> https://lists.freedesktop.org/mailman/listinfo/pulseaudio-discuss


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