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Crumar DS-2


Released: 1978



Adds a second LFO and "polyphonic" (i.e. divided oscillator) section Architecture Class: Conventional (subtractive).

Ebay Description:

The Crumar DS 2 is a 44 key, monophonic analog synthesizer (with a polyphonic section), featuring dual oscillators (with glide), 24dB resonant low pass filter, dedicated VCF and VCA ADSR envelopes, dual LFOs, and gate input and output.


Form Factor Dimensions Weight Audio Input Audio Output Communication Port Control Input Control Output Switch Input Power
44 keys ? ? no high low stereo no gate:5V gate:5V no AC


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


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


Effects Pan Modulator Volume Modulator Headphone
N/A no LFO1 LFO2 VCA-EG yes


Arpeggiator Arpeggiator External Sequencer Sequencer Memory Sequencer External Continuous Program Change
no N/A no N/A N/A pitch bend paddle no


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


Name Signal Class Waveform Octave Range Amplitude Modulator Harmonics Modulator Pitch Modulator Wave Assign Modulator
DCO1 digital pulse saw square triangle 4' 8' 16' 32' no PWM:LFO1 PWM:LFO2 LFO1 LFO2 glide no
DCO2 digital pulse saw square 4' 8' 16' 32' no no LFO1 LFO2 glide no
Noise digital pink-noise white-noise - no no no no
Poly digital saw - no no LFO1 LFO2 no


Name Signal Class IC Resonant Shape Frequency Modulator Resonance Modulator Shape Modulator
VCF analog discrete yes 24dB low pass LFO1 LFO2 VCF-EG no no
Poly analog discrete no low and high pass no no no


Name Level Rate Loop Polarity Trigger Level Modulator Rate Modulator
VCF-EG sustain attack decay release no no key no no
VCA-EG sustain attack decay release no no key no no


Name Waveform Delay Polarity Sync Delay Modulator Level Modulator Rate Modulator
LFO1 up-saw down-saw square triangle yes no no no no no
LFO2 up-saw down-saw square triangle yes no no no no 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