Bonjour,
Merci pour votre réponse !
J'ai remarqué qu'en insérant cette ligne dans le fichier config.txt, l'audio sortait bien des GPIO

dtoverlay=pwm-2chan,pin=18,func=2,pin2=13,func2=4

Encore merci et bonne soirée !

@teko whatever you expect, GPIO can't be shared or you'll face some serious malfunction. 1 GPIO pin should be used for only a single purpose : arcade button, led, reset or power. With the configurable mk_arcade, you must remove as many arcade buttons as "side use" you'd wish.if you want power + reset + led, that's 3 gpio ... 3 less arcade buttons, not sure it's a good idea

@Substring Ah ouais je vois je pense que je vais me pencher du coté du PCB

If you want the exact mapping of the N64, you need to edit yourself the buttons and switch to a custom config. What you need is :

edit the files in /recalbox/share/configs/mupen (or mupen64 or mupen64plus, i never remember) add in the recalbox.conf and add at the bottom (or wheverever else) n64.configfile=dummy so that the files you edited won't be overwritten

This will be slightly easier in Recalbox 4.1

@subs So we close this one here with a reference: https://forum.recalbox.com/topic/4091/n64-controller-connected-gpios-4-0-0-beta5-gamecon-driver