Volume balance (left, right)

[PaulM]

It is possible via the command line (via SSH), but it’s not a permanent solution. It will probably reset after a reboot, and probably needs software volume control to be enabled.
Try the code below (can’t test it right now) to shift the balance to 80% left, 20% right.

amixer sset Master 80%,20%

If that works, maybe they can incorporate it indeed.

@nlwouter

Is there anyone that could help me with modifying the SSH files to change to volume balance

SSH is a method of getting access to the “behind-the-scenes” (the command-line) of Volumio via another computer; it is not the configuration in itself. Check a quickstart guide on SSH and things will become clear, also how to run the aforementioned command.

@Ytheleus

I want it because the devices in my playback chain do not have LR balance function and my speakers are unavoidably offset from the ideal equi-distant position as well as one being stuck in an upper corner of the room, which skews the stereo image badly. LR balance would be helpful to correct or partly correct this.

Audio-wise the volume only partly corrects the skewed stereo image. The difference in distances creates two problems, i) volume differences, as sound pressure level decreases with distance, and ii) delay from one channel; sound takes roughly 3 ms to travel 1 meter, and 5-10 ms is already noticeable by most humans. The latter you cannot correct for.