Extract a sound from a Classic application for Mac OS X?
I had some System 7 Sound files, too. I just tried DaveM's answer, and it worked, except I had to set the frequency to 11025 (not 8192).

My steps:


Used Rezilla to copy the raw hex from the resource fork.
Used Hex Fiend to paste it as a regular file (added .au extension, but that doesn't really do much since it's still not directly playable)
Audacity > File > Import > Raw Data, select .au file
Change Sample Rate to 11025 Hz
Export as wav!