Moog Music Minimoog Voyager XL - Manual (Page 17)

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Voyager XL User’s Manual - The Components
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Voyager XL User’s Manual - The Components
Wave:
Each oscillator features a continuously variable WAVE (waveform) control. The legend on the front panel
shows the pure waveforms that are available. They are triangle, sawtooth, square, and rectangular. The
waveform is morphed gradually from one to another as the waveform control is rotated. Because the
waveform is voltage controlled, this parameter can be modulated;
this generates some very interesting timbral changes. By limiting the
modulation between the square and skinny pulse waveform, you
can get pulse width modulation. Although the waveforms can be
set from the front panel individually for each oscillator, modulation
through the Mod Busses is applied to all three waveform controls
simultaneously. When using modulation, it is possible to make the
width of the rectangular wave so skinny that it becomes silent.
1-2 Sync:
The 1-2 SYNC switch is one of four switches located at the bottom of the oscillator panel. In the ON
position, the 1-2 SYNC switch synchronizes Oscillator 2 to Oscillator 1. Oscillator sync is an effect caused
by resetting an oscillator waveform’s start point with another
oscillator as shown here (the effect is more noticeable if the synced
oscillator is a higher frequency than the reset oscillator). The main
frequency heard is that of the reset oscillator. As the frequency of
the synced oscillator is swept, it reinforces the harmonics of the
reset oscillator. Depending on how it is applied, the effect can be
aggressive or warm and vocal. This effect is much more dramatic
when Oscillator 2 is set to a higher octave than Oscillator 1.
3-1 FM:
In the ON position, the 3-1 FM switch establishes direct linear Frequency Modulation (FM) of Oscillator
1 by Oscillator 3. When an Oscillator is used as a CV source for another VCO, it is called frequency
modulation. Frequency modulation effects can vary from vibrato or trill effects to clangorous inharmonic
sounds to rich timbres that evoke acoustic sounds. Linear FM is the kind of frequency modulation used in
classic FM synths.
TIP: Several factory presets illustrate the use of extreme modulation to force the rectangular
wave to silence. For examples, check out the “Waveform Dance” and “Relaxation Drone”
presets.
3 KB Cont (Oscillator 3 Keyboard Control):
The 3 KB CONT switch disables keyboard control of Oscillator 3 when in the OFF position. By disabling
the keyboard control, you can use Oscillator 3 as a drone or as a modulation source whose frequency
doesn’t change with the key played. In addition to turning off the keyboard control of Oscillator 3, switching
to OFF increases the amount by which the Oscillator FREQUENCY control changes Oscillator 3’s
frequency.
3 Freq (Oscillator 3 Frequency):
The 3 FREQ switch selects Oscillator 3’s frequency range. When the switch is in the LO position, Oscillator
3 operates as a sub-audio sound source (producing clicks) or as a modulation source (auxiliary LFO). When
the switch is in the HI position, Oscillator 3 operates with the same available frequency range as Oscillator 2.