Companies using Linux in musical gear besides
Lionstracs: Plugzilla (a
rack that can play VSTs), Muse Receptor (similar concept), Hartman
Neuron (a synth). Unfortunately the others are based on pretty
closed design and most don't even tell you that's based on Linux.
Perhaps their attitude will change
in future.
I just quickly checked their sites, and there's indeed absolutely no
mention of using Linux. If they're all indeed using Linux, then it's an
obvious breach of the GPL license.
Marek