TurboGrafx CD Audio issues

[UberLumby]

Raspbian 5.4.51c71 armv71
Raspberry pi 4 4GB model
Retropie 4.6.7
Retroarch 1.8.8
Beetle PCE Fast (v0.9.38.7)

I've been playing Castlevania rondo of blood for a little bit and the audio is really muffled and tuned down. Sometimes even fading in and out.. is this known issues with the turbo CD or is there a potential fix for this?

[UberLumby]

I changed the audio in setting and boosted it but now turbo16 is too loud

[mitu]

@UberLumby You can adjust the volume just for the pcengine system by editing the retroarch.cfg in \\retropie\configs\pcengine and adding a line with the audio_volume option:

audio_volume = -1.00