fix binary compatibility for several classes (I missed this before)
the soft synth loads by default /boot/beos/etc/synth/big_synth.sy (which I locally linked to a General Midi sf2 bank
tested with MidiSynth 1.6 on Haiku
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@17864 a95241bf-73f2-0310-859d-f6bbb57e9c96
fix SoftSynth::PlayHandler, offset and incr are counted in samples
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@17853 a95241bf-73f2-0310-859d-f6bbb57e9c96