Oberheim Four Voice
A big step forward after the initial Oberheim SEM and Two Voice synthesizers came from the bigger and better Four Voice. Four dual-oscillator SEM modules each with its own filters and envelopes are joined together along with a simple analog mixer and 49-note keyboard to give you a polyphonic/polytonal Obie-beast!
This combination gives you eight oscillators and four voices of polyphony because there are basically four discrete mono-synths all connected together. This has its pros and cons. What is cool is that this was a lot of simultaneous voices for the mid-seventies. And the ability to craft a different sound on each voice led to some diverse and complex sounds. However, it also meant you have to program each voice independently. Each voice also has its own independent audio output.
The Polyphonic Synthesizer Programmer, released in 1976 and added to the Four Voice stores 16 patches per voice (all of which can be different). The Four Voice could accommodate an additional four SEMs, making it just like the Eight Voice model which officially appeared in 1977.
Unfortunately the Four Voice was blown out of the competition by the release of the polyphonic Sequential Prophet-5, which offered true polyphony with a single set of sound shaping controls and comprehensive patch memory. The Four Voice has been used by 808 State, Depeche Mode, Styx, Pink Floyd, The Shamen, Gary Wright, Joe Zawinul and John Carpenter.
Lookup Oberheim Four Voice Prices
The link above will take you to an eBay search for this synth to see active listings with more images, specs and information. If you don't find it there, try looking in our forum marketplace. Our marketplace gets thousands of visits every week so make sure to check back often if you want to buy or sell a synth.
Related forum topics
Are you looking to buy or sell a Oberheim Four Voice? Post an ad in Gear For Sale or a request in Gear Wanted. For spare parts and repair services check out Gear Services & Other Goods. Our forums also has a Buyer’s Guide section where you can ask for advice on buying synthesizers.
- The link above will take you to an eBay search for this synth to see active listings. If you don't find it there, try looking in our forum marketplace or post a wanted classified.
- Polyphony - 4 voices
- Oscillators - 8 VCO's (2 per voice) with sawtooth or variable-pulse waveforms
- LFO - LFO with triangle wave only
- Filter - Low, band, high, notch filter w/ resonance
- VCA - 2 ADR envelopes
- Keyboard - 49 keys
- Arpeg/Seq - None
- Memory - 16 patches via programmer module
- Control - CV / Gate
- Date Produced - 1975-1979
- Shop for Keyboards, MIDI & Gear
- Resources & Credits
Images from Perfect Circuit Audio.
Thanks to Bonnie Goodwin for this information.
Errors or Corrections? Send them here.