The audio that screams from an SEM is fat, fine and funky, with a tonal variety unlike any other sound-generating device on this rock we call home. Gang up four of these monsters, and you've got sounds that're thicker than thunder.

SON OF 4 VOICE's SEMs bring back vintage '70s design ... 100% discrete analog ... absolutly no custom chips.

SO4V can be used as a 4-voice polyphonic synth or as 4 individual synths under MIDI control. Two SO4Vs can be ganged together to create an 8-voice.

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The Polyphonic Voice Control and Programmer section retains all the features of the original Four Voice Programmer and Keyboard control modules, while adding gotta-have-'em goodies like these:
• Two MIDI sync capable LFOs with multiple waveshapes including sample and hold per voice •Two programmable ADSR envelope generators per voice • Selectable master tuning (both VCOs or VCO2 only) allows easy detuning for huge unison sounds • Polyphonic portamento with linear or exponential response • Noise generator connected to filter input #1 • External audio or A440 tuning reference connected to filter input #2 • Updated output module with mix and pan control for each voice • Two SO4Vs can be easily connected together - result: eight voices!

Each SO4V is equipped with a Tom Oberheim signature plate.

The Tom Oberheim SON OF 4 VOICE will bring classic audio whomp to your arsenal of sounds. There's nothing else like it anywhere.

Specifications subject to change.

SO4V availability: 2012

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SEM-related product questions may be directed to Tom Oberheim: tom (at) tomoberheim (dot) com. Visit for more.

Contact GSF: 310-995-0100 or via email: geoff (at) gsfagency (dot) com