4 Voice is a semi-modular analog polyphonic synthesizer, assembled and based on the four SEM modules. Thus, the synthesizer incorporated eight voltage-controlled oscillators (VCO), two per voice, four controlled filters, four VCA and ADS envelope...
2 Voice Pro is the favorite creature of Tom Oberheim. It almost completely replicates the set of functions introduced in the model released in 1975. "Almost" means that the synthesizer received some additional functions to the set of the original ones....
Keeping track of the success of his first synthesizer and willing to create a new product, Tom Oberheim simply combined two SEM modules with a keyboard and a basic sequencer putting them into one housing. This made it possible to get a duophonic...
