Kakapo

Korg MS-20 sequencer written in Pure Data for Bela. Host.pd generates float numbers which are then converted to voltages on Bela in _main.pd.

Bela analog out 1 => MS-20 VCO 1+2 CV IN
Bela analog out 2 => MS-20 TRIG IN

Demo

Patch

Features

• 8 steps
• adjustable tempo
• adjustable trigger duration
• pitch quantization
  • Linear (slider values are sent out as is),
  • Cmajor (values are rounded up to a closest note in C major scale),
  • Cminor (values are rounded up to a closest note in C minor scale)

CV

Korg MS-20 uses Hertz per volt (Hz/v) CV implementation. Therefore slider values are converted to voltages accordingly. If the sequencer needs to be used with a different synth, the conversion coefficient would need to be adjusted.

Trigger

Korg MS-20 uses S-trigger or Negative trigger.