Problem with Reicast + Hifiberry DAC + background music

[cubacraft]

Hello,

I'm here to ask for your help because I have a problem with Reicast. Indeed, this one worked perfectly with my DAC until I installed this python script:

https://github.com/Rydra/bgm-for-es

In order to get the sound on Reicast with my DAC, I realized this:

sudo nano /boot/config.txt
And scroll down to the bottom. If you see a line that says: dtparam=audio=on

Disable it by putting a # in front.
Then add:
dtoverlay=hifiberry-dacplus
on the next line. Save the file.

Next create /etc/asound.conf with the following content:

pcm.!default {
type hw card 0
}
ctl.!default {
type hw card 0
}

Then go to: /home/pi/.reicast/emulators.cfg and change it to this:

reicast-audio-alsa = "CON:/opt/retropie/emulators/reicast/bin/reicast.sh alsa %ROM%"
default = "reicast-audio-alsa"
reicast-audio-oss = "CON:/opt/retropie/emulators/reicast/bin/reicast.sh oss %ROM%"

The sound worked perfectly with this manipulation before the script was installed.

Reicast works with reicast-audio-oss and reicast-audio-omx mode but without sound. The problem must be the incompatibility of the method used to pass Reicast sound through the DAC and the python script to put music in the background on the menu. I searched for a long time, without being able to find a solution despite, I think, having identified the problem.

Thank you in advance for your expertise and help.