
via
this auction

"There are lots of unique and useful features to be found, like a "chorus" waveform setting for OSC 1, "pitched noise" on OSC 2, two LFOs--one of which only applies to the pitch of OSC 1, and the other only effects the filter and speed of the chorus waveform. Intrigued? Well how about autobend on OSC 1, with extensive control (speed, delay, bend up/down), or two ring modulator settings on OSC 2? The filter is magical, with Korg's first version of the resonant highpass/lowpass combination. Another amazing feature is the ability to run external audio through the filter and/or the ring modulator, which is one of the best 70's ring mod sounds ever. Truly a stunning synthesizer, the 770 rivals its more famous Korg siblings in sound, design, and features."