Oberheim OB-1
Released: 1976
MSRP: $1895US
Synopsis:
A more typical monosynth, significantly different from SEM. Architecture Class: Conventional (subtractive).
Ebay Description:
The Oberheim OB-1 is a 37 key, monophonic analog synthesizer, featuring dual oscillators (with sync), resonant 12dB or 24dB low pass filter, dual ADSR envelopes, an LFO, 8 presets, proprietary tape interface, and CV IO.
Physical
| Form Factor | Dimensions | Weight | Audio Input | Audio Output | Communication Port | Control Input | Control Output | Switch Input | Power |
|---|---|---|---|---|---|---|---|---|---|
| 37 keys | ? | ? | filter | low:1VAC high:10VAC | tape:Molex (optional Cassette Interface) | CV gate filter:pedal volume:pedal | CV gate | program-select:Molex | wired |
Interface
| Compatibility | Multitimbral Memory | Program Memory | External Storage | External Programming | UI Input | UI Output |
|---|---|---|---|---|---|---|
| - | no | 8 | no | no | knobs/switches | LED |
Architecture
| Multitimbral | Polyphony | Unison | Architecture |
|---|---|---|---|
| 1 | 1 | no | VCO1+VCO2+noise->VCF->VCA |
Output
| Effects | Pan Modulator | Volume Modulator | Headphone |
|---|---|---|---|
| no | no | VCA-EG pedal | no |
Control
| Arpeggiator | Arpeggiator External | Sequencer | Sequencer Memory | Sequencer External | Continuous | Program Change |
|---|---|---|---|---|---|---|
| no | N/A | no | N/A | N/A | BendLever filter:pedal volume:pedal | external |
Keyboard
| Key Pressure | Chord Memory | External Control | External Sustain | Key Scaling | Velocity Curves |
|---|---|---|---|---|---|
| no | no | CV gate | no | no | no |
Source
| Name | Signal Class | Waveform | Octave Range | Amplitude Modulator | Harmonics Modulator | Pitch Modulator | Wave Assign Modulator |
|---|---|---|---|---|---|---|---|
| VCO1 | analog | saw/triangle(variable) pulse sub:square | +-1 | no | FM:VCO2 PWM: LFO | LFO portamento BendLever | no |
| VCO2 | analog | saw/triangle(variable) pulse sub:square | +-1 | no | sync:VCO1 PWM: LFO VCF-EG | LFO VCF-EG portamento BendLever | no |
| Noise | analog | noise | - | BendLever | no | no | no |
Filter
| Name | Signal Class | IC | Resonant | Shape | Frequency Modulator | Resonance Modulator | Shape Modulator |
|---|---|---|---|---|---|---|---|
| VCF | analog | discrete | yes | 12|24dB low pass | key LFO VCF-EG pedal | no | no |
Envelope
| Name | Level | Rate | Loop | Polarity | Trigger | Level Modulator | Rate Modulator |
|---|---|---|---|---|---|---|---|
| VCF-EG | sustain | attack decay release | no | no | no | no | no |
| VCA-EG | sustain | attack decay release | no | no | no | no | no |
LFO
| Name | Waveform | Delay | Polarity | Sync | Delay Modulator | Level Modulator | Rate Modulator |
|---|---|---|---|---|---|---|---|
| LFO | sine square random | yes | no | no | no | BendLever | no |
 |  |  |  |  |  |  |  |
 |  |  |  |  |  |  |