Controllers - Moog Minimoog Model D User Manual

WAVEFORM
(Continued)
PULSE 1 / SQUARE
The harmonic content of a Pulse wave is based on the width of the top half of the wave in relation to
the bottom half of the wave, also known as the duty-cycle. In the Square wave, the width of these two
portions of the wave are equal. As with the Triangle wave, the Pulse 1/Square waveform contains only
odd-numbered harmonics, but with greater energy. A Square wave provides a rich starting point for
string-like sounds.
PULSE 2 / WIDE RECTANGLE
As the Pulse wave changes from Square to Rectangular, even numbered harmonics are introduced, but
the overall harmonic mix is changed. The wide rectangle forms the basis for hollow, reedy sounds.
PULSE 3 / NARROW RECTANGLE
As the Pulse wave continues to get narrower, lower numbered harmonics—both odd and even—are
emphasized. The resulting timbre takes on a more nasal tone.
TIP: Mixing a Triangle wave from one Oscillator with the more complex wave of another Oscillator allows
you to emphasize one particular harmonic without adding unwanted overtones. Changing the relative
tuning of the Triangle wave Oscillator can enhance this effect.
OSC. 3 CONTROL
Oscillator–3 is unique. Normally, all Oscillators are controlled directly from the keyboard and Pitch
wheel. Turning the orange rocker switch to OFF releases OSCILLATOR–3 from keyboard control,
providing a greater range of frequency control and allowing it to run free as a modulation source.
OSCILLATOR MODULATION
When this switch is set to ON, the Oscillators can be modulated by Oscillator 3, Noise, Filter Contour,
an External Mod Source, and the LFO (Low Frequency Oscillator) as defined by the CONTROLLERS
settings and the Modulation Wheel position.

CONTROLLERS

The Minimoog Model D contains a number of modulation sources that can affect the pitch of
the Oscillators or the Cutoff Frequency of the Filter. In this regard, the Minimoog Model D has
been modified from its original design, and two black rocker switches have been added to the
CONTROLLERS section. Each switch selects between two modulation sources, while the Modulation
Mix knob controls the balance between them. In the end, the Modulation Wheel (located on the
Left-Hand Keyboard panel) controls the amount of modulation applied to the Oscillators and or Filter.
OSC. 3/FILTER EG SWITCH
This switch to the bottom left side of the CONTROLLERS panel is
used to choose the modulation source that will be assigned to the
counterclockwise position of the MODULATION MIX knob. Normally,
this switch would be set to OSC. 3, allowing Oscillator–3 to be assigned
as a modulation source. In the FILTER EG position, the shape defined
by the ATTACK TIME, DECAY TIME, and SUSTAIN LEVEL knobs of
the Filter Contour are used as a modulation source. Filter EG is an ideal
modulation source for creating analog brass and percussion sounds.
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