Hi Nicholas,
I have a high end PC with great video card and high end USB audio interface. I have been using Synthesia with Virtual Midisynth.
After upgrading to 10.4, I can no longer see the falling notes (although do see the keys light on the virtual keyboard. I also no longer have an entry choice for Virtual Midisynth under my output. Audio works with Microsoft Wavetable, but it does suck (of course).
I tried to go back to 10.3, but that's not working. Any ideas?
--Andrew