Oberheim OB-SX
Original (OB-X based) OB-SX
Updated (OB-Xa based) OB-SX
Released: 1980
MSRP: $?
Synopsis:
Preset only (no programming) OB-X or OB-Xa (more OB-Xa than OB-X).
Architecture Class: Conventional (subtractive).
Ebay Description:
The Oberheim OB-SX is a 49 key, polyphonic analog preset synthesizer, featuring dual oscillators, resonant 12dB low pass filter, dual preset envelopes, a preset LFO, chord memory, and CV IO.
Physical
Form Factor
Dimensions
Weight
Audio Input
Audio Output
Communication Port
Control Input
Control Output
Switch Input
Power
49 keys
?
?
no
mono
computer (proprietary)
CV gate
CV gate
sustain
AC
Interface
Compatibility
Multitimbral Memory
Program Memory
External Storage
External Programming
UI Input
UI Output
-
N/A
24|48|56
no
no
knobs/buttons
LED
Architecture
Multitimbral
Polyphony
Unison
Architecture
no
4|6
yes
VCO1+VCO2+noise->VCF->VCA
Output
Effects
Pan Modulator
Volume Modulator
Headphone
no
no
pedal
no
Control
Arpeggiator
Arpeggiator External
Sequencer
Sequencer Memory
Sequencer External
Continuous
Program Change
no
N/A
no
N/A
N/A
BendLever
ModLever
filter:pedal
vibrato:pedal
no
Keyboard
Key Pressure
Chord Memory
External Control
External Sustain
Key Scaling
Velocity Curves
no
yes
computer
(proprietary)
pedal
no
no
Source
Name
Signal Class
Waveform
Octave Range
Amplitude Modulator
Harmonics Modulator
Pitch Modulator
Wave Assign Modulator
VCO1
analog
saw
pulse
+-1
no
no
LFO
portamento
BendLever
no
VCO2
analog
saw
pulse
+-1
no
no
LFO
portamento
BendLever
no
Filter
Name
Signal Class
IC
Resonant
Shape
Frequency Modulator
Resonance Modulator
Shape Modulator
VCF
analog
CEM3320
yes
12dB low pass
no
no
no
Envelope
Name
Level
Rate
Loop
Polarity
Trigger
Level Modulator
Rate Modulator
VCF-EG
-
attack
decay
no
no
no
no
no
VCA-EG
-
attack
release
no
no
no
no
no
