General MIDI Player
General MIDI Player provides an easy way to use General MIDI instruments on your Mac, and allows you to play these instruments using either your mouse, computer keyboard, or MIDI device (both hardware and software MIDI devices supported). It has a simple, one-screen interface, that will let you start making music in seconds, turning your Mac into any one of the 128 built-in GM instruments on your Mac.
How was MAX used?
The application is written entirely in Max 6.