Funny thing .. Sound package contains a code, which used by VMMaker for generating sound plugin..
which means that depending on the hacks and on forks (Pharo having different Sound package version than Squeak), you will end up with different VMs.. Sounds cool yeah? :)
I propose to carve out all VM-specific behavior from this package and put it into separate package like VMSound, or or just directly into VMMaker, because in current state this sounds baddd :)