Voltage Controlled MIDI Arpeggiator

I was asked to develop a simple-to-use and simple-to-include Voltage Controlled MIDI Arpeggiator.

Specs from the customer:

  • No generic MIDI processor which has to be configured
  • Built as module for a modular setup
  • To be integratable in any MIDI chain
  • Plug in and use
  • 5 different programs how MIDI chords should be serialized:
    – Down-Up
    – Down
    – Random
    – Up
    – Up-Down
  • Remote control / external trigger
  • Transparent passing of MIDI sequences when not activated by remote control

Specs I added because I consider them as useful:

  • Adjustable processing and repetition speed (CLOCK)
    – Manually with a pot
    – Per CV
    – Per external clock input
  • Speed / clock created by the module or provided externally is provided at a clock output for synchronization purposes of other modules
  • Monophonic MIDI streams are processed with a ratcheting effect, only chords are processed with Arpeggio
  • Ratcheting repetition rate is determined by program selecten (2-6)

First demo video: A polyphonic keyboard is used with a monophonic modular setup:

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