Korg Monotribe Mod / Illuminant Pitch Control

August 4, 2011 · Posted in Uncategorized 

Background information:

I found a way to control the Monotribe’s pitch. Checkout this example with a photoresistor.

So this is something what a lot of people have been looking for. An option to control the Monotribes pitch and gate via CV. While the Monotribe’s ribbon controller is nothing else but a resistor, more to say likea pot, i soldered some cables to the spot where the ribbon controller is connected to the main pcb.

I first did some test with a 10K pot what worked very fine, because the ribbon controller is a 10K pot. Second attempt was a photoresistor. Final attempt was to build up a four step 4017 sequencer like the baby 10 type, but with slight modifications. I used the schematics presented on this site: FONIK.

I modified the cv out by adding a transistor, so that the cv out works more like a resistor and not like a real CV. The inspiration came from the midibix wiki (see Option 2 schematic) And that works excellent with the monotribe. The 4017 i used can be greatly clocked by the Monotribe’s sync output.

If you need more information on the schematics… please leave a comment, so i will know that someone is interested and i have a reason to sit down and draw the stuff together.

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