Oberheim SEM
SEM
Released: 1974
MSRP: $695US
Synopsis:
Basic analog synth expander used to complement other period synths.
Architecture Class: Conventional (subtractive).
Ebay Description:
The Oberheim SEM is a desktop, monophonic analog synthesizer, featuring dual oscillators (with sync), resonant multimode (low, band, notch, or high pass with FM) filter, dual ADS envelopes, an LFO, and CV inputs.
Physical
Form Factor
Dimensions
Weight
Audio Input
Audio Output
Communication Port
Control Input
Control Output
Switch Input
Power
desktop
?
?
filter
mono
no
CV gate
no
no
?
Interface
Compatibility
Multitimbral Memory
Program Memory
External Storage
External Programming
UI Input
UI Output
-
N/A
no
no
no
knobs/switches
LED
Architecture
Multitimbral
Polyphony
Unison
Architecture
no
1
no
VCO1+VCO2->VCF->VCA
Output
Effects
Pan Modulator
Volume Modulator
Headphone
no
no
ENV1
no
Control
Arpeggiator
Arpeggiator External
Sequencer
Sequencer Memory
Sequencer External
Continuous
Program Change
no
N/A
no
N/A
N/A
no
no
Keyboard
Key Pressure
Chord Memory
External Control
External Sustain
Key Scaling
Velocity Curves
no
no
CV
gate
no
no
no
Source
Name
Signal Class
Waveform
Octave Range
Amplitude Modulator
Harmonics Modulator
Pitch Modulator
Wave Assign Modulator
VCO1
analog
saw
pulse
mix
-
no
PWM:
LFO
ENV1
CV
LFO
ENV1
CV
no
VCO2
analog
saw
pulse
mix
-
no
sync:VCO1
PWM:
LFO
ENV2
CV
LFO
ENV2
CV
no
Filter
Name
Signal Class
IC
Resonant
Shape
Frequency Modulator
Resonance Modulator
Shape Modulator
VCF
analog
discrete
yes
low|band|notch|high pass
LFO
ENV2
CV
no
no
Envelope
Name
Level
Rate
Loop
Polarity
Trigger
Level Modulator
Rate Modulator
ENV1
sustain
attack
decay
no
no
no
no
no
ENV2
sustain
attack
decay
no
no
no
no
no
LFO
Name
Waveform
Delay
Polarity
Sync
Delay Modulator
Level Modulator
Rate Modulator
LFO
triangle?
no
no
no
no
no
no
