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 -------------- next part -------------- An HTML attachment was scrubbed... URL: <https://lists.freedesktop.org/archives/pulseaudio-discuss/attachments/20171111/f4583f46/attachment.html>