You can always send it. They’re so super light it’s probably better if your time is worth anything. It’s not a problem I’ve seen so would take some investigation probably. Could be dirty switches maybe..try wiggling things first.

my korg micropresetsometimes goeshorribly out of tune while playing and almost every time i change presets. any ideas of what should i do?

Oh right didn’t understand you there. Delta indeed has that issue with caps around LM13600 (and failure of 13600 in one I did)

@sounddoctorin sorry – think i got things mixed up and have confused matters – I was talking about the Delta which I thought zoso11 was talking about above (even though this vid is about the Micropreset)? :-S – I bet the Micropreset has the 35 in it! But I’m sure the Delta has LM13600!

Yup. The machine does have two Korg 35 filters though which are… 4 transistors, 1 FET, and half a dozen or so resistors. Really fairly simple circuits in those modules but great sounding! I’m not sure the LM13600 got in there but not as the primary filters anyway… Perhaps they’re in there as a vca? I with the diagram was more readable. I can see the “Korg 35″ designator and I remember then when I looked inside. But not sure about the dual ota’s.

Yeah it’s a great little machine to have in the mix. I haven’t studied diagram I guess on this one because the resolution is horrible on the pdf I have! But generally that seems to be the case. One filter for the traveller control on the synth sounds and one for presents probably from the way it behaves.

Loving the sound of the Micropreset. Full of character!
@zoso11 – try replacing 4x 0.001 microF tantalum caps (C21,22,23,24) located near the LM13600 filter opamps!

No but there’s one to the right of it on the wall. It had about every problem imaginable due to the work of a clever mouse . I cleaned it up and parts were just falling off boards. The problem you are having though…not sure what’s going on there. Check power supply rails to make sure they’re good by probing pins 4 and 8 of a 1458 or 4558 op amp which I seem to recall are in there.. Or they might be under another name in that one come to think of it bu they are the most common 8 pin chip

is that a delta with its back to the micro preset? i have one, its broke something up with the synth board, think ive narrowed it down to the resonance knob, makes the sound pop and bang in and out, then after its warm, just goes to barely hearable (if thats a word)

Wow! Brought back loads of memories from almost 30 years ago when I first played one. Your demo is inspiring so I’ve just bought one off eBay, can’t wait to get it home. Will complement my old Oberheims and Prophet fine. With this machine having 2 filters, is one used for the orchestral presets and the other for the Traveler control on the Synth sounds?
Great Demo! just shows what old analogue gear can do.
Cheers
Pete

Use a contact cleaner like deoxit D5 for switch contacts, not WD40 in general I think. WD40 has things in it which are designed to leave a non-conductive film I believe.

hey there loved the demo i recently managed to get hold of 1 but when i set the selection dial to 18 the sound goes and if i tinker with it it comes back.was just wondering if you knew how i could fix it at all or help with any info. i might try wd40 cheers Jamie

So many of these old units, while limited in many respects, have strengths that can find their way into pieces of actual music The extensive amount of hardware that went into doing these simple things presents a reality. Other instruments can try to mimick that reality with less hardware but the human spirit is incredibly perceptive I believe and it knows the phony and the real thing. Especially those who are still youthful. Older people seem to lose touch with it often.

Wow, this korg really has an awesome tone! A friend of mine used to have one of these but he sold it because he thought it sounded like crap. I think I need to have a word with him…

And never worked on or play an EK22. Let me know how you like it!

Hehe not surprising. It’s really hard to tell on those types of sounds..especially since the sigma and ms10 have the same hardware involved to a good degree and I’ve never played with an MS10/20 so just a raw guess knowing they are capable of similar sounds architecture wise. Nice video anyway. Looks exactly like a typical day in the streets of Bozeman

Tottally wrong im afraid, wheezy is sigma, bow wow wow is cs15d 3rd sound is juno your right about the monopoly tho, the later leads are sigma and cs15d only 2nd chorous is sigma my favorite sound coming out of it too, rectangle +flute +string with a touch of reverb, getting an elka ek 22 should arrive this week, know anything about that unit?

Hehe…boy it’s tough. I think the CS15D is doing the later lead lines and the wheezy part at the first MS10. The bow bow bow bass is maybe JUNO? Hard to say which parts are the Sigma because it’s so tonally flexible unless someone does something trade mark like move the filter joystick Is the third held sound Sigma …I think you gave that away . But process of elimination..eheh. And the 4th rounder tone I’m guessing Mono/poly. Yeah I do all kinds of nutty stuff w/sigma.

I hope you put the polymoog vid up, the korg sigma is great to play, especially the quick portamento button but its so weird, needs more modulation do you ever use the pitch bend with the after touch? it sounds unique. I like to tune the synth to a different note and play two notes at once, you can hear it on a track on my channel called italo buster, synths used were the siggy, cs15d, monopoly, juno 60, and korg ms 10, can you identify them all???

Hey, I actually have a polymoog video but it’s a bit dark. I was going to try to edit it down and enhance it and see if it works ok without reshooting and just haven’t gotten around to it. The Sigma is one of my favorite monosynths. It’ll definitely get covered soon here. Polymoog is great for certain sounds. A very unique machine though not massively diverse of course in the types of sounds available. But much depth within the basics.

What a great tone, ive just looked at your gear list on your site, wow, could you please do a demo of the polynoog, what about the Korg Sigma, i have one but don’t have a camera to record, id love to see what you think of those two machines.