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Oberheim OB-1

Analog Monophonic Synthesizer

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Oberheim OB-1
Oberheim OB-1
1 400.00 street price

This small analog monophonic synthesizer strongly influenced the sound of pop music of the 1980s. The main feature that explains the popularity of OB-1 - the ability to save settings in one of eight presets.

All functional blocks are built on discrete elements (late representatives of the OB series used specialized CEM chips).

The synthesizer has two voltage controlled oscillators (VCO), each of which has an independent frequency controller, a micro-tuning, an octave switch. There are triangular and rectangular waveforms available that can be transformed by built-in converters into saw, reverse saw, meander with different duty cycles and intermediate forms.

For modulation, an LFO is provided that produces a sine or square wave. The modulation signal can be sent to the cutoff frequency of VCF or modulate (FM and PW) VCO.

The voltage controlled low-pass filter (LP VCF) has cutoff, resonance and modulation depth adjustment. There is a selection of the number of VCF stages, which allows you to obtain a slope of 12 or 24 dB per octave. A keyboard tracking mode is also provided (higher notes have a higher cutoff frequency).

OB-1 has two built-in ADSR envelope generators. One of them is dedicated to VCF, the second - to VCA.

The synthesizer got a non-dynamic keyboard with 37 keys. The "transpose" switch allows you to change the pitch within three octaves.

Pitch bend control has an original implementation - it is carried out with a lever.

OB-1 was used by Supertramp, Electronic Dream Planet, Tangerine Dream, Sky, Herbie Hancock, Rush.

Country of origin / production: USA

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More info
Usage area
Usage Design/ Form Factor
With Keys 
Analogue (A) 
Tone Generator / Sound Synthesis
Oscillator Type VCO (Voltage Controlled Oscillator)
Oscillators per voice2
Waveform/ Spectral form (main generator) Pulse Width Modulation (PWM)
Waveform/ Spectral form (main generator) Triangle
Waveform/ Spectral form (main generator) Saw
Waveform/ Spectral form (main generator) Reverse Sawtooth
Programs/ Voices/ Timbres
Low-pass Filter (LPF) 
Envelope Generator (EG)
Arpegiator/ Portamento
Type Synth Action
Number of Keys37
Built-in controllers
Pitch Bend/ Modulation Lever 
Audio out
Analogue: 1/4" (6.35mm)2
Audio in
Analog 1/4"1
Voltage 110V
Voltage 60Hz
Power Supply Built-in, internal
Case/ body
Production start1978
Production end1982
Production ended

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