FWIW under (Open)Solaris sound isn�t working either.
I only got the first tone then silence (checked it with Squeak 4.6:
(FMSound lowMajorScaleOn: FMSound pluckedElecBass) play
linux is a different story, and probably that affects other unixes as well: the libALSA is being replaced for libpulse (at least in ubuntu boxes) and that is causing a lot of problems. Now I more or less made ALSA work, but just part of it and I suppose that happens if the weather is well, etc. etc. I still have in my todo made a proper port of the ancient pulse support, but so far� not ready :)
Esteban