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.
This version includes a precise MIDI to CV version for use with all standard MIDI gear and allows MIDI control of pitch and gate. It also includes an "auxilary CV" which allows a user-selectable parameter with multilple destinations to be controlled via MIDI (see full MIDI specs below).
Specifications:Two oscillators, each with sawtooth and variable-pulse wave, pulse width and frequency modulation amount, ext envelope and LFO modulation select switches
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
MIDI to CV Converter Section
MIDI to CV section operates independently of SEM; no digital circuitry in audio path
Full featured, high-precision MIDI to CV Converter, tightly integrated with SEM module
Two high-resolution control voltage outputs
Control voltage #1 - devoted to keyboard control voltage
Control voltage #2 - auxiliary CV with multiple sources and destinations
Multiple key assignment modes: low, high, and last-note with legato and multiple-trigger modes
SEM-specific control: LFO reset, VCF tracking of keyboard CV
Transpose + / - two octaves
External audio input signal processing
Single-Voice Monophonic Analog Synthesizer
Dimensions: 11.50" x 8.375" x 5.25"
Weight: 6 lbs
Power: 100 - 240 volts, 50-60 Hz, built-in mains transformer