Synth Museum

"Synthesizer preservation via research and education."

The Web SynthArk


Crumar Spirit

Spirit (image courtesy of

Released: 1983



An extremely versatile monosynth designed by Bob Moog, along with Tom Rhea and Jim Scott. Architecture Class: Conventional (subtractive).

Ebay Description:

The Crumar Spirit is a 37 key, monophonic analog synthesizer, featuring dual oscillators (with ring mod), 24dB resonant low pass filter, resonant band or high pass filter, dedicated VCF and VCA ADSR envelopes, "ModX" LFO, "ShaperY" (LFO or AD|ASR envelope), and CV/gate inputs and outputs.


Form Factor Dimensions Weight Audio Input Audio Output Communication Port Control Input Control Output Switch Input Power
37 keys ? ? filter mono ShaperY no CV gate pedal:OscB pedal:Filter CV gate no AC


Compatibility Multitimbral Memory Program Memory External Storage External Programming UI Input UI Output
- N/A no no no buttons/knobs LED


Multitimbral Polyphony Unison Architecture
1 1 no DCO1+DCO2->VCF->VCA


Effects Pan Modulator Volume Modulator Headphone
no no LoudnessEG no


Arpeggiator Arpeggiator External Sequencer Sequencer Memory Sequencer External Continuous Program Change
yes no no N/A N/A Pitch-Wheel ModX-Wheel ShaperY-Wheel no


Key Pressure Chord Memory External Control External Sustain Key Scaling Velocity Curves
no no CV gate no 1 no


Name Signal Class Waveform Octave Range Amplitude Modulator Harmonics Modulator Pitch Modulator Wave Assign Modulator
OscA analog pulse saw triangle 4 8 16 32 no PWM:ModX Ring:triangle glide LFO ModX Pitch-Wheel ShaperY no
OscB analog pulse saw triangle +2 -1 2Hz-10kHz no PWM:ShaperY Ring:triangle sync glide pedal ModX Pitch-Wheel ShaperY no
Noise analog white/pink-noise - no no no no


Name Signal Class IC Resonant Shape Frequency Modulator Resonance Modulator Shape Modulator
Upper analog CEM3350 yes 12|24dB low pass FilterEG key LFO ModX pedal no no
Lower analog CEM3350 yes band|high pass FilterEG key ModX pedal ShaperY no no
Brightness analog passive no 6dB low pass no no no


Name Level Rate Loop Polarity Trigger Level Modulator Rate Modulator
FilterEG sustain attack decay release no yes key ModX ShaperY no no
LoudnessEG sustain attack decay release no no key ModX ShaperY no no


Name Waveform Delay Polarity Sync Delay Modulator Level Modulator Rate Modulator
ModX S/H (red noise or ShaperY) red-noise square triangle OscB:triangle no no no no ModX-Wheel ShaperY no
ShaperY variable down-saw/triangle/up-saw attack decay no key no ShaperY-Wheel no
Conventional Models
Orchestrator DS-1 DS-2 Performer T1 T2 T1-C CPB-1
CPB-2 Trilogy Stratus Composer Spirit Bit One Bit01 Bit99