RetroPie-BGM-Player BGM Music works in menu sound stopped working in games

hopwon

I just installed this v.nice BGM player which works fine but when I launch a game no in-game sound.
I am using the HifiBerry-Amp Hat, RPi4. Which I DID refer to the RetroPie docs to install correctly. Sound was working fine so something installed by RetroPie-BGM-Player is locking the sound I guess?
I do not have pulseaudio installed.
Previously in alsamixer there was Master and Channels where I could change the volume. Now there is an additional "PCM" level, if I try to raise the volume on PCM the volume does actually increase until I take my finger off the volume up key and it resets to zero. So something in locking the access to PCM?

My /etc/asound looks like this:

pcm.hifiberry {
    type softvol
    slave.pcm "plughw:0"
    control.name "PCM"
    control.card 0
}

pcm.!default {
    type             plug
    slave.pcm       "hifiberry"
}

Prior to install of RetroPie-BGM-Player it looked like this:

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

Simple mixer control 'Master',0
  Capabilities: volume volume-joined
  Playback channels: Mono
  Capture channels: Mono
  Limits: 0 - 248
  Mono: 163 [66%]
Simple mixer control 'PCM',0
  Capabilities: volume
  Playback channels: Front Left - Front Right
  Capture channels: Front Left - Front Right
  Limits: 0 - 255
  Front Left: 0 [0%]
  Front Right: 0 [0%]
Simple mixer control 'Channels',0
  Capabilities: volume
  Playback channels: Front Left - Front Right
  Capture channels: Front Left - Front Right
  Limits: 0 - 248
  Front Left: 248 [100%]
  Front Right: 248 [100%]

I can confirm I do not have an .asound file in my home directory.
Any pointers, tips glaring obvious mistakes I'm making would be a massive help please.
I have always struggled getting sound working consistently on my Pi - because of me, not because of the Pi :)

I know this is more a core pi configuration issue rather than RetroPie but I am stuck.

hopwon

It looks like the app "audacious" is grabbing the driver and keeping it. Not idea (yet) how to configure such that it can share the driver/HW.
Audacious is the app used to play music in the BGM player.

hopwon

I gave up as I see there is no support on Github or anywhere!

Uninstall and try something else