Oberheim OB-8
Released: 1983
MSRP: $4545US
Synopsis:
Updated OB-Xa with three LFOs Architecture Class: Conventional (subtractive).
Ebay Description:
The Oberheim OB-8 is a 61 key, 8 voice polyphonic duo-timbral analog synthesizer, featuring dual oscillators (with sync), noise generator, resonant 12dB or 24dB low pass filter (CEM3320), dual ADSR envelopes, three LFOs, 120 presets, chord memory, arpeggiator, tape and proprietary interfaces.
Physical
| Form Factor | Dimensions | Weight | Audio Input | Audio Output | Communication Port | Control Input | Control Output | Switch Input | Power |
|---|---|---|---|---|---|---|---|---|---|
| 61 keys | W:40in (101.6cm) D:20in (50.8cm) H:6in (15.24cm) | 38lbs | no | mono stereo | tape computer (proprietary) | clock | no | sustain program+ hold | AC |
Interface
| Compatibility | Multitimbral Memory | Program Memory | External Storage | External Programming | UI Input | UI Output |
|---|---|---|---|---|---|---|
| - | split:12 layer:12 | 120 | no | computer (proprietary) MIDI (later models) | knobs/buttons | LED |
Architecture
| Multitimbral | Polyphony | Unison | Architecture |
|---|---|---|---|
| 2 | 8 | yes | VCO1+VCO2+noise->VCF->VCA |
Output
| Effects | Pan Modulator | Volume Modulator | Headphone |
|---|---|---|---|
| no | no | LFO2 VCA-EG pedal | no |
Control
| Arpeggiator | Arpeggiator External | Sequencer | Sequencer Memory | Sequencer External | Continuous | Program Change |
|---|---|---|---|---|---|---|
| (key or hold) up down random forward reverse transpose | clock | no | N/A | N/A | BendLever ModLever filter:pedal vibrato:pedal volume:pedal | pedal |
Keyboard
| Key Pressure | Chord Memory | External Control | External Sustain | Key Scaling | Velocity Curves |
|---|---|---|---|---|---|
| no | yes | computer (proprietary) MIDI (later models) | pedal | no | no |
Source
| Name | Signal Class | Waveform | Octave Range | Amplitude Modulator | Harmonics Modulator | Pitch Modulator | Wave Assign Modulator |
|---|---|---|---|---|---|---|---|
| VCO1 | analog | triangle mix:saw/pulse | +-1 | no | PWM:LFO2 | ModLFO LFO1 portamento BendLever | no |
| VCO2 | analog | triangle mix:saw/pulse | +-1 | no | sync:VCO1 PWM:LFO2 | ModLFO LFO1 VCF-EG portamento BendLever | no |
| Noise | analog | noise:pink | - | no | no | no | no |
Filter
| Name | Signal Class | IC | Resonant | Shape | Frequency Modulator | Resonance Modulator | Shape Modulator |
|---|---|---|---|---|---|---|---|
| VCF | analog | CEM3320 | yes | 12|24dB low pass | key LFO2 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 |
|---|---|---|---|---|---|---|---|
| LFO1 | saw:up saw:down square triangle random | yes | key | no | delay attack key vibrato:pedal | no | |
| LFO2 | LFO1 | yes | key | no | delay attack key | no | |
| ModLFO | noise saw:up saw:down square triangle random | yes | no | no | LFO2-EG ModLever | no |
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