Robert Babicz asked me if we can so something with his Korg MS. He often wants something special and unique. I did some search in the internet and found some mods that sounded interesting and have been successfully tested by some users. First mod is to outlet all individual waveforms (TRI,SAW,PULSE). It was also easy to add the PWM in. FM in was also mentioned in some schematics, so I added that too. Very easy to add a OSC sync switch, which is a great feature for the MS20. The easiest thing was to add more inputs to the mixer. The final modification was to add a independent ring modulator. For the decal I first printed out a draft (thats what you see in my pics). But on the final version I ordered some decals from Musikding and did the water transfer methos, which worked pretty well. I finalized that with a few clear coats.
How does it sound? Well, follow Robert on his channel and you will find out :-) Looks like I lost the "final" jpgs...
There are lethal voltage exposed in electronic devices. Unless you know what you are doing, don’t try this. If you following along, you doing so at your own risk.
I’m documenting repairs for my reference and yours.
I do synth restorations and repair with a specialty in vintage synthesizers, drum computer and other vintage gear, based in Düsseldorf, GER. Get in touch about your synth situation!