Thesys

Thesys is an extremely powerful and intuitive MIDI stepsequencer plugin, giving you control over just about all aspects of your favorite MIDI devices.

Use Thesys to create varied and organic bass lines, screaming leads, pulsating chords, and organic pad sounds in the studio or on stage.
For live musicians, Thesys provides an extremely versatile palette of performance options which can be triggered right from your MIDI keyboard: you can transpose, manipulate, twist up, mutate, and mangle your patterns without even getting near your computer.
Thesys is a plugin which can be used with any major Windows or Mac VST or AU host. This includes Cubase, Logic, Kore, and Ableton Live, among others. No other MIDI sequencer plugin offers you the ease and power of Thesys. It is 100% MIDI compliant and therefore provides the ultimate MIDI sequencing solution.