For all those who want to use Recalbox 6.0 with the GameHat, here's how to do it:
Write the img of Recalbox 6.0 on your sdcard, then from your pc, add that parameter to the "config.txt" file at the root of the card:

hdmi_force_hotplug=1
avoid_warnings=1
max_usb_current=1
hdmi_group=2
hdmi_mode=1
hdmi_mode=87
hdmi_cvt 640 480 60 6 0 0 0
hdmi_drive=2
display_rotate=0

Use winscp and notepad++, not recalbox manager.
Then connect one gamepad (wired) and fill in the wifi settings. Then via the web interface edit the "recalbox.conf" like this:

Change statement controllers.gpio.enabled=0 to controllers.gpio.enabled=1
Change statement controllers.gpio.args=map=1,2 to controllers.gpio.args=map=5 gpio=5,6,13,19,21,4,26,12,23,20,16,18,-1

Disconnect the gamepad and reboot the recalbox. After the reboot push one button and configure!

@ian57 Salut, désolé pour la réponse tardive. Ils ont utilisé cette méthode :

« Here is a Fix to Convert Stereo to Mono Audio on the RetroFlag GPi Cases. Try at your
own Risk; be sure to back up your image first!

1. SSH into your Pi
2. Enter the command (without quotes)

“sudo nano /etc/asound.conf”

3.Paste the following code:

convert stereo to mono RIGHT output

pcm.monocard{
slave.pcm "hw:0"
slave.channels 2
type route
ttable {
# Copy both input channels to output channel 1 (Right).
0.1 1
1.1 1
# Copy both input channels to output channel 0 (Left).
0.0 1
1.0 1
}
}

pcm.!default monocard

4. Press Control X and Y to save
5. Use Command “sudo reboot” to restart »

Bonjour, nette amélioration entre la v1 et la v2. Pas de problèmes particulier.
Le son grésille quasiment plus, les message de savestate sont très lisible bien qu'un qu'ils dépassent de l'écran. Clavier virtuel bien lisible désormais...
Bonne continuation, ne lâcher rien!