Crumar Stratus Polyphonic Organ Synthesizer

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Introduced in 1982, the Stratus is a slimmed-down version of the Crumar Trilogy. It combines a synthesizer and an organ synth, which can be played separately or both at the same time. The Stratus is a 6-note polyphonic analog that uses the highly popular CEM chips that have also been used in other popular synths of the time including Jupiters, OB-X synths and Prophets. 

The organ section features four horizontal drawbars to adjust the volumes of the 4 octaves (2', 4', 8' and 16'). It has a total of two oscillators (DCOs), and they’re fed through divide-down ICs, just like an organ or string machine. The oscillators offer saw and square waveforms. The Stratus has six VCFs and six VCAs, one per voice, cutoff, resonance, envelope amount controls and an external pedal control option. The LFO can do FM, WAH or Tremolo. It also has adjustable slope and delay controls and an Octave Modulation mode. The Oscillator Glide is a portamento effect, who can be set to Mono or Multi trigger. There is a ADSR envelope generator section with independent outputs for organ and synthesizer, pedal control inputs for the filter, sustain pedal, and LFO sync. (source: synth db)