@Toni Wilen
I think there is an oddity when playing audio in CHD files. I started a thread here -
https://eab.abime.net/showthread.php?t=112171
Basically, it seems to wait a second or two before you start hearing the audio, and when speech plays on some games you don't hear the beginning of it.
I edited the .cue file from Battle Chess CD32 so that it boots straight to the CD player. I posted the CHD at the bottom of the link I posted. When you play any of the audio tracks there is a few seconds silence before you can hear it so you miss the first part. I tried the same CHD in the Sega GenesisGXPlus emulator and the tracks play fine on the CD player. They start instantly. Any chance you could have a look ?