I sing in a couple of choirs and I make midi files and mp3 files for those who ask me. I have a small problem where I need to give the same capability to the MAC users.

Here is a website: MidiPlay - A Windows program for playing Midi files

It allows the users to play the midi file, speed up the tempo, change the instrument voice and such. I only need the tempo change for the MAC.

If anyone knows of such an animal, I'd be really thankful....