Tags: werman/noise-suppression-for-voice
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Update documentation with adjustment to prevent loopback switching source/sink Today after a system update I noticed my denoised microphone source wasn't outputting any sound. This was a bit perplexing since I hadn't recompiled or changed my pulse configuration. I tried using the NoiseTorch project and found that it worked just fine, so my pulse audio configuration seemed to be the cause. After a bit of digging through pulseaudio's output, I found a line of interest: `I: [pulseaudio] source.c: The source output 0 "(null)" is moving to denoised due to change of the default source.` I found that in my case source output 0 was the module-loopback. The source output changing sources broke the module chain and my actual source was no longer being chained to the noise suppression plugin. I found the `source_dont_move` and `sink_dont_move` options for the loopback module here: https://www.freedesktop.org/wiki/Software/PulseAudio/Documentation/User/Modules/#module-loopback. These seem to be desirable options for this setup since we want the sink and source in the loopback module to stay consistent.