> tech specs
Oscillators Module
Three wide-range, high stability VCO’s (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
Five-input mixer for combining the audio sources prior to filtering.
* Input Level controls (5) adjust the relative levels of the oscillator, noise, and external audio input signals.
* Input switches (5) enable the player to quickly switch individual audio signals in and out.
* External Level LED enables the player to set the correct external audio signal level.

Filters Module
Dual mode filter module includes dual lowpass and highpass-lowpass filtering. Dual lowpass mode consists of two Moog lowpass-resonant filters in parallel, one per output channel. Highpass-lowpass mode consists of Moog lowpass filter in series with a highpass filter.
* CUTOFF control sweeps the frequencies of both filters throughout the audio range.
* SPACING control sets the spacing between the frequencies of the two filters, over a +/-3 octave range.
* RESONANCE control adjusts the resonance of both filters, from none (pure lowpass response) to filter oscillation.
* KB CONT AMOUNT control sets how much the filters open and close as the player presses different keys on the keyboard.
* Dual Lowpass/Highpass-Lowpass switch selects between dual lowpass operation or highpass-lowpass operation.

Envelopes Module
The Envelopes Module generates two wide-range ADSR (Attack Decay Sustain Release) envelopes. The Filter Envelope sweeps the filter and is available for modulation shaping. The Volume Envelope shapes the overall volume.
* ATTACK controls (2) determine the attack times of the envelopes.
* DECAY controls (2) determine the decay time constants of the envelopes.
* SUSTAIN controls (2) determine the sustain levels of the envelopes.
* RELEASE controls (2) determine the release time constants of the envelopes.
* AMOUNT TO FILTER control determines how much the filter envelope will open and close the filter, from full negative (inverted envelope) to full positive (non-inverted envelope).
* ENVELOPE GATE SWITCH selects whether the envelopes will be triggered by the keyboard, on , or by an externally-applied gate.

LFO Module
Low Frequency Oscillator generates triangular, square, Sample & Hold, and smoothed Sample & Hold waveforms for use as modulating signals.
* RATE control sets the LFO rate over the range 0.2 Hz (one cycle every five seconds) to 50 Hz (fifty times a second).
* WAVE LFO selector selects Triangle, Square or Sample & Hold (Stepped or Smooth) waveforms for use with the Mod Busses.
* RATE LED provides visual indication of the LFO rate.

Enhanced Modulation Busses Module
Selects the sources, destinations, and shaping signals for the two modulation busses.
* SOURCE selectors (2) selects the modulation source from the LFO, Oscillator 1, Oscillator 2, Oscillator 3, noise or the external modulation input (MOD2).
* DESTINATION selectors (2) selects the modulation destination from Pitch, Oscillator 2, Oscillator 3, the filter cutoff frequencies, the oscillator waveforms, or LFO Rate.
* CONTROLLER selectors (2) selects the Mod Wheel, MOD1, Velocity, Pressure, Filter Envelope or Volume Envelope to shape the modulation signal on that bus.* AMOUNT controls (2) sets the overall modulation amount for each bus.