” Here’s a Vintage Korg MS-20, its the Mark I grey face filter which is a little bit rarer I believe. The filter is aggressive.
It was serviced in 2008 by LA synth tech “Synthfool” Kevin Lightner, RIP.
He rebuilt the Sample and Hold circuit, replaced a cracked key and the front panel jacks, and generally cleaned it up as well as tuned it.
It sounds good. But is in need of more tuning and cleaning.
I’ve included a video of me playing each key, and then running an arp via Midi to CV while tweaking the VCOs and filters. You’ll see in the video that certain keys ‘wobble’ in pitch. Also, notice the volume knob crackles with use, you might get some intermittent noise like that from the pots. I’m not a tech, but maybe this means the contacts need to be cleaned on it in general and especially the keyboard, it is after all 40 years old.
I’m listing it ‘for parts’ as there is no return and these issues are documented, but I’m assuming someone will clean and tune it and not strip it out for parts, which would be a ridiculous shame..”
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