Oscillators Module. 3 wide-range, high-stability VCOs (Voltage Controlled Oscillators) with continuously variable waveforms.. FREQUENCY controls (2) vary the frequencies of Oscillators #2 and #3 over a +/-7 semitone range with respect to Oscillator #1.. OCTAVE selectors (3) set the frequency ranges of the oscillators in six octave steps.. WAVE controls (3) provide continuous control over the waveforms of the oscillators, from triangular, to sawtooth, to square, to narrow rectangular.. 1-2 SYNC switch synchronizes the Oscillator #2 waveform to the frequency of Oscillator #1, for dramatic timbral effects.. 3-1 FM switch provides linear frequency modulation of Oscillator #1 by Oscillator #3.. 3 KB CONT switch disconnects Oscillator #3 from control by the keyboard, thereby enabling it to function as a drone.. 3 FREQ switch lowers the frequency of Oscillator #3 into the sub-audio range, thereby enabling it to function as a low frequency audio or modulating oscillator.. Mixer Module