B.
OSCILLATORS
The Oscillators are the main sound source of the Voyager. The oscillators in the
Voyager are all analog Voltage Controlled Oscillators, or VCOs. They feature a
temperature regulation circuit that provides them with excellent tuning stability. The
VCOs can produce a total musical range of 8 ½ octaves! In addition, the
frequency of oscillator 3 can be set to sub-audio (<20Hz) vibrations for use as a
second LFO.
Oscillator One performs as a master oscillator to which Oscillator 2 and 3 are
tuned. The timbres of the oscillators are adjusted by their variable Waveform
controls. In addition, there are switches for Oscillator 2 sync to 1; Linear Frequency
modulation of oscillator 1 by 3; Oscillator 3 keyboard control on/off; and Oscillator 3
Lo or Hi frequency range. The frequencies of the Oscillators are controlled by a
number of sources. The main source is the keyboard. The keyboard outputs a
voltage that allows the oscillators to be played in an equal tempered scale. The
glide circuit can be switched in between the Keyboard CV and the oscillators to
slow the changes between notes. The Keyboard CV is mixed with the Octave
switch CV, the Frequency control (oscillators 2 and 3), the Pitch Bend Wheel, the
Pitch CV In (on the back panel), the fine tune control, and the output of the Mod
Busses when the “Pitch” destination is selected.
OCTAVE
: Oscillator Octave switch (6 positions)
Each Oscillator has a switch labeled Octave that selects the relative frequency
range. To hear how it works, turn off oscillators 2 and 3 with the mixer. Turn Oscillator
1 on and set its level to 5. Play a note on the keyboard and rotate the Oscillator 1
octave switch clockwise one click – the note will rise an octave. You can use this
control to change the frequency range that the keyboard controls. The markings 32’
up to 1’ are octave standards based on organ stops. On the 16’ setting the highest
A on the keyboard should be A440.
FREQUENCY
: Oscillator 2 and 3 Frequency control
Oscillators 2 and 3 have a Frequency control. When the control is in the center
position, the oscillators should be in tune with the frequency of Oscillator 1 (when the
octave switches for all three oscillators are in the same position). The frequency
control can change the pitch of oscillator 2 or 3 a total of + or – 7 semitones
