Technical data

The INTERVAL control tunes OSCILLATOR A
relative to OSCILLATOR B, over a span of ±P5 (like
violin strings). For proper tuning of the instrument,
tune OSCILLATOR B using the FINE TUNE control;
then tune OSCILLATOR A to match OSCILLATOR B.
The DOUBLING control isn't really a tuning
GIVEN THIS TUNING:
control. It is a panpot that mixes in a tonethat is either
one or two octaves lower than OSCILLATOR B
DOUBLING can't get "out of tune" with
OSCILLATOR B.
You can use the INTERVAL and DOUBLING
controls to produce "parallel chords," for example:
.UNISON
INTERVAL WAVESHAPE
OSCILLATOR A
MIX
OCTAVE ^ WIDEFREQ
MASTER ASB V
WAVESHAPE DOUBLING
OSCILLATOR B
WHEN YOU PLAY:
YOU HEAR:
ts:
So far, we've referred to the audio signal
generated by an oscillator only as an "electrical
pattern." This pattern is called a "waveshape." A
waveshape is simply a way of piauring a sound; the
waveshape of acoustic instruments or the oscillator of
a synthesizer may be observed on an oscilloscope.
Most traditional instruments have a distinctive
waveshape that helps us identify that instrument's
timbre, or tone color. The Multimoog has oscillators
that produce electrical waveshapes which are
translated by the speaker into a wide variety of
timbres. If a signal generated by an oscillator has the
same waveshape as a sound created by a traditional
instrument (other factors such as attack and release
considered), their sounds will be similar. Different
waveshapes can have different timbres; set up the
sound chart and let's listen:
EXERCISE 2: OSCILLATOR WAVESHAPE/TIMBRE RELATIONSHIP
1. Hold any key on the keyboard down. You are
listening to the sound of a "sawtooth"
waveshape.
3. Look at the panel graphics for the WAVESHAPE
control. The waveshapes are named after their
shapes.
2. Slowly rotate the OSCILLATOR B WAVESHAPE
control through its positions. Between positions
"5-6" you will hear the sound of the "square"
waveshape. As you move toward "10," you hear
various "rectangular" waveshapes.
30
4. Move the WAVESHAPE control smoothly and
regularly above and below, say, position "5."
When the waveshape changes like this it is said
to be "dynamic." Later you'll learn how to
control oscillator waveshape with a voltage to
create dynamic waveshapes automatically.
(END EXERCISE)
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