| Notes | The OB-SX was envisioned by designers to be a smaller, lighter, more durable "live performance" version of their (then) flagship OB-X. The OB-SX featured the same VCO/VCF/VCAs of the OB-X and a voice card design similar to the OB-Xa in which polyphony was based on the number of 2-voice PCB cards installed (using CEM/Curtis chips). Sacrifices were made to the OB-X's "knob for each function" programming interface (replaced in the "SX" by a few realtime only filter and envelope controls), the ability to save patches (all sounds were preset in ROM) and the last octave of the keyboard ("chopped" to 48 notes).
Polyphony - 2, 4, or 6, voices
Oscillators - 2 VCO's
LFO - 1 variable from 1/10 osc/sec to 20 osc/sec
Filter - VCF with envelope, dedicated cutoff control
VCA - ASR Envelope
Keyboard - 48 keys
Memory - 24 (early units) 48 or 56 (later units) Preset sounds
Control - CV/GATE (early units) "Oberheim System" digital interface (later units)
Date Produced - 1980 - 1983 |
