Five12’s Numerology version 2.3 (and later) adds extensive external control support for the Novation Launchpad.

Control options include all the “Note Sequencer” modules: The MonoNote, PolyNote, Chord Seq, Drum Seq, Matrix Seq and Matrix Arpeggiator, as well as preset control, and audio mixer control.

Numerology Sequencer

Numerology is a modular music sequencing and audio plugin environment for Mac OS X. It takes the step sequencing and modulation metaphors established by the analog sequencers of the 70’s, and implements them in a structured and highly interactive software environment designed for experimentation, improvisation and live performance.

By using Numerology in conjunction with your choice of Audio Unit plugins and hardware synths, you can create an open compositional environment that is truly your own.

via Five12:

Showing off mappings for the Drum Sequencer, MonoNote Sequencer, Mixer settings and Stack Presets. The drums are played by the built-in DrumKit module, the bass is a Moog Voyager.