Crumar DS-2
Released: 1978
MSRP: ?
Synopsis:
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.
Physical
| 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 |
Interface
| Compatibility | Multitimbral Memory | Program Memory | External Storage | External Programming | UI Input | UI Output |
|---|---|---|---|---|---|---|
| - | N/A | no | no | no | knobs/sliders | LED |
Architecture
| Multitimbral | Polyphony | Unison | Architecture |
|---|---|---|---|
| 1 | 1 | no | DCO1+DCO2->VCF->VCA |
Output
| Effects | Pan Modulator | Volume Modulator | Headphone |
|---|---|---|---|
| N/A | no | LFO1 LFO2 VCA-EG | yes |
Control
| Arpeggiator | Arpeggiator External | Sequencer | Sequencer Memory | Sequencer External | Continuous | Program Change |
|---|---|---|---|---|---|---|
| no | N/A | no | N/A | N/A | pitch bend paddle | no |
Keyboard
| Key Pressure | Chord Memory | External Control | External Sustain | Key Scaling | Velocity Curves |
|---|---|---|---|---|---|
| no | no | gate | no | 1 | no |
Source
| 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 |
Filter
| 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 |
Envelope
| 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 |
LFO
| 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 |
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