B.Schaffl is a groove quantizer LV2 MIDI plugin.

B.Schaffl is a slider/shape-controlled MIDI amp & time stretch plugin to
vitalize sequencer-controlled MIDI instruments and to produce shuffle/swing
effects.

Key features:
* MIDI velocity amplification and timing manipulation plugin
* Swing and shuffle rhythms
* Pre-generator dynamics
* Tempo rubato
* Pattern (sliders) or shape-controlled
* MIDI filters
* Smart quantization
* Group / link individual instances of B.Schaffl
* Free and open source

WWW: https://github.com/sjaehn/BSchaffl