This little guy came into my studio a couple weeks ago. I actually traded a Roland MC-202 for it. I've never really been too excited about Korg products. I had an EX-800 and a DW-8000 when I was a kid but nether of them are much fun to play with (though I did think the EX-800 was somewhat interesting and sometimes imagine getting another). Anyway, I'm really loving this 770. The shape and size of it are just perfect. I mean, this is really what you see when you close your eyes and imagine an analog monosynth. And then the way things are labeled, there are controls called "traveler", "singing level", "scale noise". It's actually a little confusing at first, and I've played tons of different synthesizers. But it's that bewilderment that makes it so exciting. It makes it seem more experimental than most synthesizers, more radiophonic perhaps.
And it sounds great! I mean really great. It's strange because the controls are somewhat limited: just a switch with two setting for the resonance level on the filter, same with LFO and envelope amount. All sort of really strange things that should be limiting, but somehow don't seem to matter so much. I don't use this expresion much (because it's kind of stupid) but this synthesizer truly is more than the sum of it's parts.
Here is a great little piece from S.O.S about this era of Korg:
And here is a song that I suspect must be using the 770, if not... it's channeling it's spirit for sure.