Using the joystick to adjust audio volume in MAME/Retroarch

[ChrisK]

Hi,

I would like to be able to adjust the volume in MAME games by pressing the hotkey and moving the joystick up/down (which by default changes the save state slot). I've edited the retroarchcustom.cfg file (in share/system/configs/retroarch), deleting the lines:

input_state_slot_decrease_axis = +0
input_state_slot_increase_axis = -0

and replacing them with:

input_volume_down_axis = +0
input_volume_up_axis = -0

Now I find that moving the joystick changes both the volume AND the state slot. When I reopen the retroarchcustom.cfg file I can see that the two lines I deleted have reappeared.

Is there any way I can permanently stop hotkey+joystick up/down from changing the save slot?

[olivierdroid92]

@chrisk
Hi
Did you try with a surcharge ?

https://wiki.recalbox.com/fr/advanced-usage/configuration-override#:~:text=Vous pouvez surcharger les configuration,les jeux d'un répertoire.

[ChrisK]

@olivierdroid92 I did try, but without success. However, I couldn't work out how to use a configuration override file to "cancel" an existing setting. What should I put in the override file to delete the default input_state_slot_decrease_axis and input_state_slot_increase_axis settings?

[Zing]

@chrisk Try something like this:

input_state_slot_decrease_axis = "nul"
input_state_slot_increase_axis = "nul"
input_volume_down_axis = +0
input_volume_up_axis = -0