CRUMAR STRATUS

Overview

The Crumar Stratus is an analog polyphonic synthesizer introduced in 1982. It’s a slimmed-down version of the Crumar Trilogy, combining a synthesizer and an organ section in one instrument. Known for its unique features and warm analog sound, the Stratus represents Crumar’s transition from organ builders to synthesizer manufacturers.

Sound Generation

• Type: Analog polyphonic synthesizer
• Sound Characteristics:
  • Two DCOs with sawtooth and square waveforms
  • Six VCFs and six VCAs (one per voice)
  • Warm filter sound with good flexibility

Features

• Polyphony: 6 voices
• Keyboard: 49 keys (4 octaves C-C)
• Oscillators: 2 DCOs with sync and separate tuning
• Filter: VCF with cutoff, resonance, and envelope amount controls
• Envelope: ADSR generator
• LFO: With rate, slope, delay, and depth controls
• Effects: Oscillator Glide (Portamento)
• Organ Section: 4 horizontal drawbars for 2′, 4′, 8′, and 16′ octaves
• Unique Features: Alternate Saw/Square mode, Octave Modulation mode

Connectivity

• Audio Outputs: Independent outputs for Synthesizer and Organ sections
• Control Inputs: Pedal inputs for filter, sustain, and LFO sync
• Other: TM Interface for Steiner Master’s Touch wind controller

Legacy

The Crumar Stratus is considered a rare and unique instrument in the world of vintage synthesizers. Its combination of synthesizer and organ sections, along with distinctive features like the Alternate Saw/Square mode, set it apart from conventional analog poly-synths of its time. The Stratus has gained recognition for its warm sound and versatility, making it a sought-after instrument among collectors and enthusiasts.

Production Details

• Manufacturer: Crumar
• Release Date: 1982
• Current Status: Out of production, considered rare