MIDITrail is a MIDI player which provides 3D visualization of MIDI data sets. You can enjoy not only listening but also viewing. MIDITrail supports Standard MIDI File (format 0/1), and multiple MIDI ports. Quick Start 1. Click "Option" -> "MIDI OUT ", select "Apple DLS Music Device" to Port A. 2. Drop your MIDI file into the window. 3. Push space key to play/pause, and push ESC key to stop.