Saturday Synth Porn: Jacob Watters wanted more from his Korg Monotron, so he created the Megatron, a MIDI and voltage controlled bass synth, based on the Montron.
- MIDI Control – using the MIDI-IF kit.
- Re-Enable the Ribbon
- CV Control – This is a simple mod due to the solder points on the Monotron’s PCB.
- Pulse Wave – using a comparator, he created a pulse wave from the Monotron’s saw wave. The comparator has a control for the width of the pulse.
- Sub-Oscillator 1 – A second comparator is used to generate a square wave that clocks a 4040 divider. The first output of the divider is an octave below the sound source, and is used as a sub-oscillator.
- Sub-Oscillator 2 – The second output of the 4040 divider is two octaves below the sound source, and is used as a second sub-oscillator.
- Envelope – a simple AD envelope control to the filter that can be toggled on or off.
- Power – a 7805 power regulator that uses a 9V DC adapter. This eliminates the need for batteries.
- Tuning – volt/octave tuning trimpot was moved for accessibility.
Here’s a video of the Megatron in action:
See the Jacob Watters site for details on the mods.