Qtractor is an Audio/MIDI multi-track sequencer application written in C++ around the Qt framework. The target platform will be Linux, where the Jack Audio Connection Kit (JACK) for audio, and the Advanced Linux Sound Architecture (ALSA) for MIDI,
This project contains several tools for testing MIDI drivers and devices in the Mac OS X (Darwin) MIDIServer environment. It may also function as sample code for accessing MIDI services on Mac OS X.