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Syntheziser korg 770 - 1976
korg 770

Korg Inc. (株式会社コルグ, Kabushiki-gaisha Korugu), founded as Keio Electronic Laboratories, is a Japanese multinational corporation that manufactures electronic musical instruments, audio processors and guitar pedals, recording equipment, and electronic tuners. Under the Vox brand name, they also manufacture guitar amplifiers and electric guitars.

[Image: gazJWIp.jpg]

The Korg 770 is a 32 key monophonic analog synthesizer with 2 oscillators which could cover many or your analog synth leads, weird noises, and more. It had a monster ring modulator and an analog input for processing other sources.

1976 was to be another huge year for Korg-branded gear. Firstly, there were two Mini Pops rhythm machines, the SR120 rhythm machine, and numerous foot pedals. There was also the Korg 770, a superb (and often overlooked) little monosynth that extended many of the ideas embodied in the 700 and 700S.

The Korg 770 is a two-VCO, monophonic synthesizer with a 32-note (F-C) keyboard.

The two VCOs sit at the top of the panel, one to the left and one to ther right with a mixer section between them. The oscillators can be mixed, ring modulated, or one can modulate the other to create FM sounds. VCO2, the one on the right, can also be a noise generator. The mixer includes a switch to choose one or the other VCO. VCO1 can take external input (like a mic or a guitar) and feed it through the signal path. A very nice feature.

To the left of VCO1 is the LFO speed knob. Below that is the portamento control, with a switch allowing alternation between knob settings and a fixed port speed. Below VCO1 is the filter section. The low pass and high pass filters are in an unusual, and very useful, stacked configuration, and are sliders, not knobs.

This allows you to make intercepting filter sweeps with one hand, and allows you to get to resonance points very easily. The four switches in this section set the ranges for the filters, 'brightness', and how much LFO to add to the filter path. To the right of the filter section is the envelope/trigger section. Only attck and 'singing' (release) are slider controlled. Sustain is set by a 3 postion 'x1 x10 x100' switch.

Triggering switch allows percussive, sustain, and hold. Another exciting enhancement in this unit was the final button in this setion, triggering. Allows VCO triggering by key, LFO, and remote.

Final section, far right bottom, is other mods. Two mods, tremelo and ptch bend. Tremolo does what you would expect, with speed and delay settings.

Pitch bend allows up or down bending, knobs for amount and speed. The control this synth offered was amazing.

Polyphony - 1 - Monophonic
Oscillators - VCO-1: Scale (64', 32', 16', 8', 4', 2'), Waveform (triangle, square, sawtooth, pulse, PWM, External Signal).
VCO-2: Coarse Tuning (16'-1'), Fine Tuning, Mode Selector (sawtooth, Ring 1, 2, Scale Noise, Pink Noise, White Noise).
LFO - 2 (LFO2 is called VCO Vibrato)
Filter - (2) VCF's: High Pass and Low Pass (Traveler).
VCA - VCA + ENVELOPE GENERATOR: Attack Time, Singing Level, Range Selector, Sustain Selector, Envelope Mode Selector, Trigger Mode Selector
Keyboard - 32 Keys
Memory - None
Control - VCF foot pedal; CV/Gate mods can be added; Mouth/Breath Controller
Date Produced - 1976!!

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