I've noticed when reloading my save state on Lemmings that all the sound has shifted to being higher/squeakier (even for a Lemming!). Even if I reboot it does the same thing
This is launching from ADF (Lemmings1991PsygnosisDisk1of2crSR.adf and Lemmings1991PsygnosisDisk2of2crSR.adf)
Even booting from scratch it seems to do it!
An entire reboot of the A600GS hasn't solved it!
Oh, it seems to be every game! No idea how to resolve this?