Tom Oberheim first dreamed up the SEM module back in the '70s, and this Pro version brings that legendary analog heart to life in a compact, playable package that's perfect for hands-on sound sculpting.
At its core are two discrete analog SEM modules, each packing a pair of VCOs with sawtooth and variable pulse-width waveforms, plus FM and PWM options, feeding into multi-mode filters with low-pass, high-pass, band-pass, and notch responses. You've got four ADSR envelopes total, two LFOs per voice with multiple waveshapes including sample-and-hold, and a dedicated global vibrato LFO for instant shimmer. The 37-key velocity-sensitive keyboard with aftertouch drives it all, assignable to filters or amps, while the Bendbox panel offers pitch-bend (up to 12 semitones), mod wheel with CV out, fine tune, VCO2 detune for thick unison vibes, octave transpose, and headphone jack. Over 56 mini-jack patch points across the SEMs, sequencer, and controls unlock semi-modular madness, with dual 16-step sequencers storing up to 99 patterns (chainable into songs via 9 slots), MIDI clock sync, ratcheting, rests, and polyphonic sequencing. Rear panel handles stereo outs, dual audio ins, full MIDI I/O, and CV/gate outs per SEM.
Players love its authentic Oberheim growl—fat, organic tones that cut through mixes—paired with the upgraded sequencer and expressive keyboard that make it a joy for live performance or studio jams, even if the price reflects its boutique build.
