Tom Oberheim is proud to reissue the classic SEM monophonic analog synthesizer expander module. The return of huge, juicy analog synth tone at an affordable price!
Originally released in 1974, the SEM is one of the classic discrete analog synths, with a huge, three-dimensional "fat" tone that must be heard to be believed. Tom's reissue cuts no corners- the circuitry is almost identical to original units. The only component changes were made due to unavailable parts, but the great tone has not been affected. No digital voice circuits, or thin-sounding analog "voice chips" here- only genuine hi-fi fat analog goodness.
IMPORTANT!
This is the "panel-only" version- it does not include a full enclosure, power supply, or panel for patch points. All patch points are easily accessible via plug connectors, and a chart of the connections is provided. You'll also need a well regulated +18/-18V power supply. This version is for the "roll your own" crowd; if you want to plug and play, we strongly recommend the SEM MIDI version or SEM Patch Panel version for those with other CV/gate analog synth gear. The panel-only version is fully compatible
with vintage Oberheim Two-, Four- and Eight-Voice systems electronically. Supplied with the module are several adapter cables that interface the signals to the new, more reliable internal connector
Specifications
Single-Voice Monophonic Analog Synthesizer
Two oscillators, each with sawtooth and variable-pulse wave, pulse width and frequency modulation amount, ext envelope and LFO modulation select switches
Oscillator sync
12db/oct multimode filter with continuously variable lowpass, bandpass, and highpass modes, ext envelope and LFO modulation select switches.
Filter input mixer with continuously variable saw to pulse wave mix for each oscillator and external input amount for processing external sources.
Two attack/decay/sustain envelope generators
Sine wave low frequency oscillator with speed control
