User Guide

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 

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 pitch CV generated by

MIDI Note Ons. 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 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,

MIDI Note On number 93 is 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 unison 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 relative to Osc. 1. This allows more than one frequency to be

played when a key is pressed, or to get a very swirly sound when the oscillators are slightly out of

tune. Note: these controls have no calibration - sometimes unisons are made with the Frequency

controls a little left or right of center. Oscillator 1 does not have a frequency control because it is

designed to serve as a reference oscillator for the other 2 oscillators.

FINE TUNE:

Fine tune control can be used to tune the Voyager’s oscillators + or – 2 semitones for matching an

external reference pitch.