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Korg 770 User Manual

Korg 770
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SYNTHESIZER
K0RG770
OWNER'S
MANUAL
£©gias/>tz+t-i'+f-
3Jl/7770£
Congratulations'on purchasing
Synthe-
sizer KORG
770. Please read
this
manual
carefully
to
ensure the unit's
fullest
performance.
&*»
MAJOR
FEATURES
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•Two Built-in Oscillators
Only the KORG 770 and
MINI-KORG
700 S in
this range of
synthesizers have
two
built-in
os-
cillators. Two tones can be
obtained simulta-
neously not only
having different colors but also
having different
pitches. In addition, it can pro-
duce sound with
colors
at
intervals of the major
third and perfect
fifth
and
percussion sounds of
bells, gongs, etc. With
rich nonintegrated har-
monics
by using a RING
MODULATOR.
•Accurate Tone Pitch
Most instruments
of this type may,
in some cases,
give
such
an image that a synthesizer is too un-
stable to produce
good quality and,accurate pitch.
However, the KORG Synthesizer
-ian
be
played
with accurate pitch as soon as?
th«j pgwer swi-
tch
is turned ON. So
far this, essergjal require-
ment has been
satisfied by onlyjK&afay
models.
•External Input Jack
.,
..jjj i\
An input
jack is
provided
fpr
cohn'ecjing an eleW
trie
guitar, electronic
'piano,
voice* of another syn-
thesizer.
Variations and changes of tone Jjjplor
can
therefore be obtained
by
passing these sounds
through the
circuitry of the VCF, the ENVE-
LOPE
GENERATOR and the RING
MODULA-
TOR and/or
combining them with
PINK NOISE,
WHITE NOISE, etc.
KORG's
Unique Traveler
Machanism
•TRIGGER/REMOTE Mechanism .
&HWc&£.Mfc
BEFORE
USE
•»*5**«"C-+<iO**»Lfc»)«*£Jn*fc
»)
Lfcv»*
Protect the unit from
heaters, sunshine,
humidity,
dust and
vibrations.
Keep neon tube lamps,
fluorescent tubes,
trans-
formers .and
electric motors away
from the unit
in order to
avoide noises. .
Be careful
. not to gijjte it a
heavy shock
A
or
a.
...
'**
drop
since
it
is a precise
instrument.
,
-
I
-
Question and Answer IconNeed help?

Do you have a question about the Korg 770 and is the answer not in the manual?

Korg 770 Specifications

General IconGeneral
Number of Voices1
Oscillators2 VCOs
WaveformsSawtooth, Square, Pulse
Keyboard37 keys
Year Released1976
TypeMonophonic Analog Synthesizer
FilterLow-pass filter with resonance
LFO1 LFO
Weight15 kg

Summary

MAJOR FEATURES

Two Built-in Oscillators

Describes the dual oscillator system for versatile sound creation.

Accurate Tone Pitch

Highlights the synthesizer's stable pitch accuracy upon power-on.

External Input Jack

Details the input for external instruments to modify sounds.

KORG's Unique Traveler Machanism

Mentions a specific KORG mechanism, likely for tone control.

TRIGGER/REMOTE Mechanism

Refers to a mechanism for triggering or remote operation.

BEFORE USE

Environmental Precautions

Advises avoiding extreme conditions like heat, humidity, and dust.

Electrical Interference

Warns about potential noise from electrical sources.

Handling Precautions

Stresses careful handling due to the instrument's precision.

FUNDAMENTAL MECHANISM OF THE SYNTHESIZER

VCO (Voltage Controlled Oscillator)

Explains the sound source component that oscillates when a key is pressed.

EG (Envelope Generator)

Controls the sound's attack, decay, sustain, and release characteristics.

VCF (Voltage Controlled Filter)

Determines the tone color by filtering the sound signal.

VCA (Voltage Controlled Amplifier)

Controls the sound's volume level.

FRONT PANEL AND KNOBS

Control Panel Overview

Identifies and labels all controls and switches on the synthesizer's front panel.

HOW TO MAKE CONNECTIONS

External Device Connections

Illustrates how to connect external instruments and accessories like amplifiers and pedals.

PLAYING PROCEDURE AND METHOD

Initial Setup and Basic Operation

Guides users on setting up controls and producing initial sounds.

VCO I Pitch Control

Explains how to adjust the pitch of the VCO I using its dedicated knob.

VCO I Octave Control

Details how to change the octave range of the VCO I in five steps.

VCO I Mode Selection

Describes how to use the MODE knob for different waveform characteristics.

WAVE FORMS

Triangle Wave

Describes the triangle wave, suitable for flute-like sounds.

Square Wave

Explains the square wave for closed-pipe instrument sounds.

Saw-Tooth Wave

Details the saw-tooth wave for rich harmonics and string/wind sounds.

Pulse Wave

Describes the pulse wave for lead sounds and synthetic tones.

NOISE GENERATION AND MIXING

Scale Noise

Provides noise with adjustable pitch for various sound effects.

Pink Noise

Offers noise without high-frequency components for specific effects.

White Noise

Provides uniform noise across frequencies for diverse soundscapes.

Mixer Function

Explains how to blend signals from VCO I and VCO II using the mixer.

VCF AND TRAVELER CONTROL

VCF and Traveler Interaction

Details how the VCF and Traveler controls shape tone color via harmonic adjustment.

Bright Switch Function

Adjusts the height of tone peaks created by Traveler lever settings in three stages.

LFO AND EXPAND FUNCTIONS

LFO (Low Frequency Oscillator)

Explains LFO for creating vibrato, tremolo, and other modulation effects.

EXPAND Switch

Links the Envelope Generator to the VCF for dynamic sound shaping.

ENVELOPE GENERATOR

Attack Time Control

Adjusts the time it takes for the sound to reach its peak amplitude.

Singing Level Control

Modifies the sound's sustaining volume level after the initial attack.

Sustain Time Control

Determines the duration of the sound after a key is released.

ENVELOPE GENERATOR MODES

Percussion Mode

Sets the envelope to cut off sound quickly, with duration controlled by other settings.

Sustain Mode

Allows sound to sustain for a defined period based on Sustain Time settings.

Hold Mode

Enables the sound to sustain indefinitely until the key is released.

RANGE AND TRIGGER/REMOTE

Range Control

Adjusts the duration of volume changes for ATTACK, SUSTAIN, SINGING LEVEL, and MODE.

Trigger/Remote Operation

Controls envelope behavior via key presses, LFO signals, or external inputs.

EXPAND FUNCTIONALITY

Expand Switch Operation

Details how the EXPAND switch interacts with the Envelope Generator and Traveler.

VCO MODULATOR

Vibrato Control

Explains how to use the Vibrato function for pitch modulation, with delay options.

Bend Control

Describes the pitch bend feature, allowing upward or downward pitch shifts.

Portamento Function

Enables smooth pitch gliding between notes, with fixed or variable time.

LFO SPEED AND HEADPHONES

LFO Speed Adjustment

Details adjusting LFO speed for Chorus, Traveler, and repeat effects.

Headphone Jack Usage

Explains the function of the headphone jack for monitoring and practice.

BLOCK DIAGRAM

Synthesizer Signal Flow

Visual representation of how sound and control signals travel through the unit.

SPECIFICATIONS

Keyboard Specifications

Details the keyboard scale, number of keys, and octave switching.

VCO I and VCO II Features

Lists specifications for pitch, octave, mode, and modulation for both VCOs.

VCF and Traveler Specifications

Outlines VCF filters, expand options, and noise generator types.

Envelope Generator Settings

Specifies controls for Attack Time, Singing Level, Range, and Modes.

VCO Modulator and Other Controls

Lists specifications for Bend, Vibrato, Portamento, LFO Speed, and Mixer.

Connectivity and Power

Details output impedance, input impedance, power supply, and consumption.

Dimensions and Accessories

Provides physical dimensions, weight, and included/optional accessories.

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