miniMO's DCO is a general purpose oscillator with several waveforms and simultaneous frequency and amplitude modulation from external sources.


Download from Github


  • Waveforms: sine, triangle, square, saw
  • Real time wave switching
  • Frequency range from 1Hz (LFO) to 1.5 KHz (higher values are possible)
  • Real time frequency range switching
  • Real time frequency and volume control
  • Real time frequency and amplitude (volume) modulation
  • Automatic Calibration Mode
  • Automatic Battery check



  Outputs: waveform
  Input 1: frequency modulation
  Input 2: amplitude modulation

  PLAY (default)
    -Knob: change frequency (default) or amplitude
      -When you change between modifying frequency and amplitude, miniMO memorizes the point where you leave the knob
      -When you start modifying a parameter again, miniMO waits until you reach the value where you left it earlier
    -Single click: cycle through the available waves, from less to more harmonics
      -After the saw wave there is a "silent wave" that mutes the output (stored volume remains unaffected)
      -After a single click, the LED blinks once
    -Double click: cycle through the frequency ranges
      -After a double click, the LED blinks twice
    -Triple click: go to frequency calibration mode (see below)
    -Click and hold: modify the amplitude using the knob
      -While holding, the LED blinks constantly
  When you enter this mode, miniMO starts an automatic procedure and maps its frequency inputs to the expected ranges
    -If you are connecting a miniMO sequencer or tuned controller:
      -Move the knob all the way down
      -Set the frequency range to the middle
      -Click the button three times
        -The LED turns OFF
      -Sweep the input through the maximum and minimum values
      -Calibration finishes automatically if no new max or min values are registered for two seconds
        -The LED turns ON
    -If you disconnected an external source:
      -Click the button three times
        -The LED turns OFF
      -Move the knob all the way up and down a few times
      -The LED turns ON
  miniMO automatically saves the calibrated values to memory and recalls them if you turn it OFF and ON again

  When you switch the module ON,
    -If the LED blinks once, the battery is OK
    -If the LED blinks fast several times, the battery is running low