The Poly Evolver Keyboard is the king of Evolver performance synthesizers. It is a four-voice synthesizer with a 5-octave keyboard, pitch and mod wheels, and a ton of knobs and switches in a clean, clear layout for the ultimate in real-time control.

Main Features:

• Each voice is a complete Evolver with four oscillators per voice, two analog and two digital.
  
• True stereo signal path with separate Curtis analog low-pass filters in each channel for each voice. Each voice has its own independent effects (feedback, delay, distortion, high-pass filter, etc.).
  
• Highly accessible sound control for easy, intuitive operation: 78 knobs and 59 switches.
  
• Clocked, pulsing blue LEDs and hardwood end-panels.
  
• Each voice has an independent 16 x 4 step sequencer. Everything (sequencer, LFOs, and delay) syncs perfectly to MIDI.
  
• In Program mode, all four voices play the same sound. In Combo mode, voices can be allocated however desired: stack all 4 for a huge unison sound, split or layer the keyboard in any configuration, and/or play one or all sequences at the same time. Each voice can respond to a different MIDI channel.
  
• Multiple Poly Evolvers can be daisy-chained for increased polyphony. “Poly Chain” mode (with dedicated MIDI output) handles voice assignment overflow for effortless expansion.
  
• Each voice has its own stereo output in addition to the mix and headphones outputs.
  
• Stereo audio input that can be routed to any or all of the voices, enabling parallel audio processing of external stereo or mono signals. The output of one
• voice can be routed to the input of another for interesting double-processing effects.
  
  

Specifications:

• 5-octave, semi-weighted action keyboard with velocity and aftertouch.
  
• Spring-loaded pitch wheel and assignable mod wheel.
  
• 512 fully editable Programs (4 banks of 128) and 384 Combos (3 banks of 128).
  
• Numeric keypad for direct access of Programs and Combos.
  
  

For each of the four voices:

• Oscillators: 2 digitally controlled analog oscillators (DCOs) with selectable sawtooth, triangle, saw/triangle mix, and pulse waves (with pulse-width modulation), and hard sync; 2 digital wavetable oscillators with Prophet VS waves and wave sequencing capability, FM and ring modulation.
  White noise generator.
  
• 2 Low-pass filters: 1 analog Curtis filter per channel, selectable 2- and 4-pole operation (self-resonating in 4-pole mode).
  
• 3 Envelope Generators: filter, VCA, and assignable (four-stage ADSR).
  
• 4 LFOs.
  
• Glide (portamento): separate rates per oscillator.
  
• Analog VCAs.
  
• Digital high-pass filter.
  
• Digital delays: 3 separate, syncable, stereo delay lines.
  
• Tuned feedback with "Grunge": use feedback as a pitched sound source.
  
• Distortion and "Output Hack."
  
• 16 x 4 step sequencer.
  
  

Ins and Outs:

• MIDI In, Out, Thru, and Poly Chain.
  
• Stereo audio input: 1/4" unbalanced.
  
• Main stereo audio output: 1/4" unbalanced.
  
• Separate stereo outputs (per voice): 1/4" unbalanced
  
• Stereo Mix Input: for Poly Chained Poly Evolvers.
  
• Sustain pedal input: accepts normally on or normally off momentary footswitch.
  
• Pedal/CV1 and Pedal/CV2 inputs: responds to expression pedals or control voltages ranging from 0 to 5 VDC (protected against higher or negative voltages).
  
• Headphone output: 1/4" stereo phone jack.
  
• Includes power supply for 110V – 240V AC operation (15 VDC, 1300 mA) and operation manual.