Moog Satellite Service Manual

Modulation
The four function tabs labeled MODULATION on the front of the unit provide a selection of modulation
types. The two MODULATION slide controls on the slide control panel adjust the RATE and DEPTH of modulation.
VIB (VIBRATO)
This tab provides a frequency-modulation vibrato
similar to the type used in electronic organs. However,
the wide range of effects offered by the two slide
controls extends the capability of this effect far
beyond vibrato and into the realm of the synthesizer.
When the VIB tab is depressed, the basic frequency
of a note is varied (or ''wiggled'') to a degree deter¬
mined by the DEPTH control and at a rate determined
by the RATE control.
RATE
The rate of modulation may be varied from approx¬
imately one second at "0" to a rate so fast that at
"10” the sound becomes a buzz. However, even at
extreme settings, the basic character of the "QUICK-
SET" voices is still apparent. For instance, MUTE
BRASS, with VIB plus RATE at 10 becomes a BUZZ-WAH
type of effect. With slower settings it is easy to
obtain the effect of trills between notes, regardless of
the voice selected.
DEPTH
This control adjusts the degree or intensity of
modulation. For vibrato (VIB), increasing DEPTH
corresponds to greater frequency variation. This
frequency variation may be adjusted from less than
one-half step (on the scale) to more than one octave.
For tremulant (TREM), increasing DEPTH corresponds
to greater timbre variation.
This flexibility, combined with the RATE control,
makes possible synthesis of such effects as "out of
tune" strings, huge bells whose clanging sounds
interfere with each other, quarter tone scales, trumpet
"shake" effects, and a myriad of others.
TREM (TREMULANT)
This tab provides modulation of the harmonic
content of the tone. The harmonic content, or timbre,
is varied at a rate determined by the RATE control
and with an intensity determined by the DEPTH control.
NOTE: VIB and TREM can be used together.
REP (REPEAT)
The repeat lab affects only those "QUICK- SET"
voices which have built-in timbre changes.
The timbre change associated with a specific voice
will be repeated over and over again at a speed
controlled by the RATE slide control. This is easily
demonstrated by depressing MUTE BRASS, REP,
OCTAVE 1 and 2, and setting RATE at 0. Play a
sustained tone, then slowly move the slide control
to 10 and return, while sustaining the tone.
NOTE: The DEPTH slide control has no effect on the
REP function.
+unrut
This control provides a most versatile tool in
achieving the distinctive sounds associated with
the MOOG synthesizer. It affects the type of modu¬
lation obtained by two of the other MODULATION
functions, VIBRATO and TREMULANT.
When this tab is in the up position, •HXirut
VIB and TREM are with a square-wave pattern. The
variation of frequency (VIB), or variation of timbres
(TREM), will be very abrupt and choppy, with discon¬
tinuities. With VIB, for instance, a definitive variation
in frequency can be obtained, like a trill.
When rut is depressed, a sine wave type
of modulation is obtained which provides a smooth
variation of timbre or frequency - almost a glissando.
The difference between the two effects is easily
discernible in the following characteristically MOOG-
type settings. Depress +torut , MUTE BRASS,
OCTAVE 2, VIB, set RATE at 3, and DEPTH at 6.
Depress any key on the keyboard and listen to the
smooth variation in frequency as you keep your
finger on the key. Then raise the tab marked +LOrut
and observe the abrupt variation in frequency. Repeat
the above steps with TREM instead of VIB, and then
combine the two.

Moog Satellite Specifications

General

Brand	Moog
Model	Satellite
Category	Synthesizer
Language	English