GForce Oberheim OB-E Software Synthesizer Plug-In (Download) The Oberheim OB-E is our take on the legendary Oberheim® 8-Voice and the first software instrument ever to receive Tom Oberheim's personal endorsement. More than just an emulation, the OB-E offers a unique musical experienceSounding HUGE, it takes the iconic Synthesizer Expander Module (SEM) based 8-Voice (a.k.a the EVS) into new sonic territory via a raft of enhancements and additions. The concept of the 8-Voice is actually very simple; based around a single SEM containing two VCOs with Pulse and Sawtooth waveforms, two ADS Envelope Generators, one LFO, and a magical Multi-Mode Filter. In isolation each SEM is monophonic, but in the 8-Voice, because there are eight SEMs triggered by a polyphonic keyboard, you have a superb eight note polyphonic synthesizer. This unique Octaphonic architecture offers fresh and exciting creative possibilities to music producers, composers and sound designers for the first time in the digital