via this auction

It sounds thick and combining all 4 instruments (solo synth, poly synth, organ and strings) gives a unique sound.
In solo synth section you have 5 waveforms to choose. You can mix it with poly synth to create thick 3 oscillator synthesizer! Leslie emulation sounds great and strings will take you to 80's :)
Interestingly Composer uses the same CEM chip to VCA, filters and envelope at such giants as Memorymoog, Oberheim OBX, OBXa/OB8, SCI Prophet 5!
This is a description made by sounddoctorin and a comparison and list of chips used in the Crumar.
Used chips:
- oscillators: (same used in: Crumar Stratus, Trilogy, Performer, Multiman)
- envelopes: Curtis CEM3310 (same used in: Crumar Stratus, Trilogy, Memorymoog, Oberheim OBX, OBXa/OB8, SCI Prophet 5)
- filter: Curtis CEM3320 (same used in: Crumar Stratus, Trilogy, Memorymoog, Oberheim OBXa/OB8, SCI Prophet 5)
- VCA: Curtis CEM3330 (same used in: Crumar Stratus, Trilogy).
Some great functions: keyboard split, mixer for all sections, ADSR, positive/negative envelope amount, cutoff, resonance, independent outputs for all parts, breath controller.
Check for more info here.
Some videos and demos of a Crumar Composer in action:" [posted here]