Recalbox on Arcade 1up cabinet

[buggasauras]

Hi all.

I have converted my gen 1 mortal kombat arcade cabinet and installed a raspberry pi with recalbox
Everything works great, except the volume button. The cabinets stock volume button has 3 settings (low, medium, high)
I have seen a number of tutorials for this but all for retropie. Example below

https://www.youtube.com/watch?v=ZEUWamPFAYs&t=273s

is there anything similar for recalbox?

The closest i have found is this tutorial on rotary encoders

https://recalbox.gitbook.io/tutorials/audio/rotary-encoder-via-gpio-digital-volume-control

Any insight on this is greatly appreciated