Anicetus_Cer
Anicetus_Cer 21 minutes ago
I know this is an old topic, but I tested the given examples in previous posts and they did not work for me, that is not to say they did not work in older versions of retroarch, for the record I just tested on retroarch 4.5.9 on my retropie handheld system.
To get the ingame hotkey volume control working add the following two lines to /opt/retropie/configs/all/retroarch.cfg;
input_volume_up = "up"
input_volume_down = "down"
Below is an example excerpt showing that I added the new lines underneath there reference lines in the retroarch.cfg file, Lines starting with a hash symbol (#) mean that they will not be interpreted, and as a general rule of thumb in linux, often show what default values will be overriden by adding the new lines.
#Line 602...
#Increases audio volume.
#input_volume_up = kp_plus
input_volume_up = "up"
#Decreases audio volume.
#input_volume_down = kp_minus
input_volume_down = "down"
#Line 609...
Note: I tend to use the volume control menu in emulation station to set the "master volume" for want of a better phrase then the in game volume for fine grained adjustment.
Hope it helps someone, if so upvote.