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I'm using Debian. I know how to remap to mono... load-module module-remap-sink sink_name=combined-mono master=0 channels=4 master_channel_map=front-right,front-left,front-right,front-left channel_map=front-left,front-left,front-right,front-right ... but how do I remap to get all sound (mono) through one speaker?

martin-tct
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1 Answers1

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  1. Downmix your audio channels from source sink to new mono sink with module-remap-sink, see https://superuser.com/a/1184812
  2. Shift the balance to the left channel with amixer set Speaker 100%,0%, see https://superuser.com/a/317297

There are some explanation:

  • Before (1) you have to configure source sink balance to center (0% or 100%/100% in Alsa) and volume to 100%.
  • After (1) Master will have "Playback channels: Mono" and the balance cannot be adjusted, so you'll have to find with amixer all mixers capable of pvolume and having non-mono channels, i.e. Playback channels: Front Left - Front Right. In my case this was the Speaker mixer.
  • Also, in my case there is right speaker degradation but on low level it's still works, so I've set amixer set Speaker 100%,30% until replaced the laptop speakers.
frost-nzcr4
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