@peterman

Is there anyway to download the 7.1.1 recalbox version?

No, only the latest official version is available.

Maybe this has something to do?

I don't have this hardware, so I can't test it, and apparently few people have it, so there aren't many related topics, and the ones that do exist are older ...

Unfortunately, I don't know how to help anymore. What you can do is open an issue:
https://gitlab.com/recalbox/recalbox/-/issues

@davidb2111 @ian57 @manoss76

Salut et merci beaucoup pour ta réponse!

J'ai fait les modifs... non sans mal, c'était en read only mais après avoir fair les commandes suivantes, j'ai pu modifier les fichiers:

mount -o remount,rw / mount -o remount,rw /boot

Au final, ça ne marche toujours pas par contre 😞
J'ai rien non plus dans ALSAMIXER

Une idée??