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Perhaps I should of made myself a bit clearer originally, my bad.

The device in general is not the focus of the problem, the problem is likely in the software that controls the sound card; i.e. mic levels, main volume levels, etc....hence my original comment calling duplicate.

Anyway, I gave this question some more thought and ended up finding a answer I gave on this very subject a few years ago; https://together.jolla.com/question/146486/microphone-volume/

Also, as with many things command line based, there are always a myriad of options/tools to do the same job. The link above shows how to do it with alsa-utils or you can do it with pacmd

I have tested the following on my device this evening; my device is a Jolla1 SFOS 3.0.0.8

MAIN PLAYBACK VOLUME:

Set volume to ZERO
pacmd set-sink-volume 1 0 (0%)

Set volume to MAX
pacmd set-sink-volume 1 65536  (100%) (default)
---------------------------------------
pacmd set-sink-volume 1 98304  (150%)
pacmd set-sink-volume 1 131072 (200%)
---------------------------------------

MAIN RECORDING VOLUME LEVEL

Set MIC INPUT to ZERO;
pacmd set-source-volume 2 0 (0%)

Set MIC INPUT to MAX;
pacmd set-source-volume 2 65536 (100%) (default)
------------------------------------------------------------------
pacmd set-source-volume 1 98304  (150%)
pacmd set-source-volume 1 131072 (200%)


Perhaps I should of made myself a bit clearer originally, my bad.

The device in general is not the focus of the problem, the problem is likely in the software that controls the sound card; i.e. mic levels, main volume levels, etc....hence my original comment calling duplicate.

Anyway, I gave this question some more thought and ended up finding a answer I gave on this very subject a few years ago; https://together.jolla.com/question/146486/microphone-volume/

Also, as with many things command line based, there are always a myriad of options/tools to do the same job. The link above shows how to do it with alsa-utils or you can do it with pacmd

I have tested the following on my device this evening; my device is a Jolla1 SFOS 3.0.0.8

MAIN PLAYBACK VOLUME:

Set volume to ZERO
pacmd set-sink-volume 1 0 (0%)

Set volume to MAX
pacmd set-sink-volume 1 65536  (100%) (default)
---------------------------------------
pacmd set-sink-volume 1 98304  (150%)
pacmd set-sink-volume 1 131072 (200%)
---------------------------------------

MAIN RECORDING VOLUME LEVEL

Set MIC INPUT to ZERO;
pacmd set-source-volume 2 0 (0%)

Set MIC INPUT to MAX;
pacmd set-source-volume 2 65536 (100%) (default)
------------------------------------------------------------------
pacmd set-source-volume 1 2 98304  (150%)
pacmd set-source-volume 1 2 131072 (200%)