I tried the changes JayceM suggested, but it didn't work. It seemed to accept the changes, but still no sound. One thing the setup keeps doing that I don't know why is, when I go to test the midi sound is change the 10 I put in for the interrup part(manually) to a 16. Could that cause the sound problem? Thanks BigJoe for the link. I'm going to try the new ZC and see if it does any different for the sound. The setup for my MPU-401 is: setup 300-307 and interrupt of 10. I tried changeing the setup number to another one in the range, but only the 300 works. Thanks for the help, I really appreciate it.