There is a Sequencer (white), a Lead-Synthesizer (black), a Drum Machine (yellow) and a Bass-MIDI-Synth (magenta) in a row. The Sequencer creates the gate signal and the midi notes for the melody and the chords. It plays the chord sequence as a synthesizer. The Lead-Synthesizer plays the Melody, the Drum Machine has the Rhythm and the Bass-Synth plays MIDI-Notes on the KORG MS 20 Mini.