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default.pa for Samsung Chromebook Plus (#14)

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Include a default.pa file which corrects the volume level for the Samsung Chromebook Plus so that volume hotkeys and volume sliders in the desktop environment behave correctly over 0-100%.
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Stephen E. Baker 2018-02-21 15:43:07 -05:00 committed by Kevin Mihelich
parent c281c0e55c
commit e505374cfd
1 changed files with 14 additions and 0 deletions
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14
Samsung_Chromebook_Plus.md
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@ -11,3 +11,17 @@ ALSA_CONFIG_UCM=/opt/alsa/ucm alsaucm -c rk3399-gru-sound set _verb HiFi
```
Note that the port will display as "Headphones" despite using the speakers. When paired with pulseaudio and pulseaudio-alsa, be aware that the full volume range is addressed through levels 0-9 of the Master volume control. Levels 10-100 provide no additional gain.
If using pulseaudio, the following can be placed in your `~/.config/pulse/default.pa` file to create a loopback device that fixes the volume levels, so that 0-100% in a desktop environment's volume bar will correspond to the audio level heard in the spaker.
```
.include /etc/pulse/default.pa
load-module module-null-sink sink_name=corrected_speakers sink_properties=device.description=corrected_speakers
load-module module-loopback source=corrected_speakers.monitor sink=alsa_output.platform-sound.stereo-fallback remix=false
set-sink-volume alsa_output.platform-sound.stereo-fallback 6553
set-default-sink corrected_speakers
```