Pattern Sequencer

This is my project to Create a simple MIDI pattern/step sequencer on Mac OS X using Cocoa and Objective-C. It is Far from finished and will surely contain bugs, but still it is already quite usable. It requires Mac OS X 10.4 and some kind of MIDI synthesizer. If you don`t have MIDI hardware, you can use a software synthesizer like Pete Yandell`s excellent SimpleSynth. PatternSequencer features up to 16 parts, each of which can have 8 different patterns. You can set MIDI channel, volume, bank and program number for each part. Patterns can be up to 128 steps long. Timing can be 4, 8 or 16 steps per Beat. Notes are edited on a 32x16 Matrix. A note can span multiple steps by dragging the mouse. Patterns can be Looped or arranged as a song. This is done in the "Score Window" where you can specify which patterns should be played in a certain sequence.