When I try to run the JavaSoundDemo.jar, I got "MIDI OUT transmitter not available" error. and the JavaSoundDemo.jar failed to start. My java runtime verison is 1.6.0_31. All other Java midi playback code failed with the same error.
In my office computer, which has older 1.6.0_2X runtime, play midi files just fine.
Is there anything missing in my 1.6.0_32 runtime? Or should I run the older working version?