Finally, here are some samples of the MCO in action.
Digital sweep: the MIDI notes (from 0 to 127) played sequentially.
Audio sample: mp3 – 688 kB or wav – 7.7 MB
Analog sweep: the modulation input is fed with a ramp wave (-4 to +4 volts), allowing a sweep over 8 octaves. The modulation range is actually higher that 8 octaves.
Spectrum and pitch
These pictures were plotted using free software Audacity.