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Xpander

Oberheim Xpander

Xpander.
Xpander

Released: 1984

MSRP: $3995US

Synopsis:

Tabletop version with half the polyphony Architecture Class: Conventional (subtractive).

Ebay Description:

The Oberheim Xpander is a desktop (velocity and aftertouch sensitive), 6 voice polyphonic, multitimbral analog synthesizer, featuring dual oscillators (with sync and FM), resonant 6-24dB multimode (low pass, high pass, band pass, notch, phase shift) filter, five DADSR envelopes, three LFOs, four ramp generators, 3 tracking generators, lag processor, 100 presets, tape, CV and MIDI interfaces, along with extensive (matrix style) modulation capabilities.

Physical

Form Factor Dimensions Weight Audio Input Audio Output Communication Port Control Input Control Output Switch Input Power
desktop ? ? no mono stereo individual:6 tape MIDI: IN OUT THRU CV:6 gate:6 pedal:2 trigger MIDI MIDI pedal:2 program+ AC

Interface

Compatibility Multitimbral Memory Program Memory External Storage External Programming UI Input UI Output
Matrix12 Xpander 100 100 MIDI SysEx MIDI knobs/buttons LED displays

Architecture

Multitimbral Polyphony Unison Architecture
6 6 no VCO1+VCO2->VCF->VCA1->VCA2

Output

Effects Pan Modulator Volume Modulator Headphone
no no key Lag velocity release-velocity aftertouch TrackingGen1-3 Ramp1-4 EG1-5 Pedal1-2 LFO1-5 Vibrato Lever1-2 no

Control

Arpeggiator Arpeggiator External Sequencer Sequencer Memory Sequencer External Continuous Program Change
no N/A no N/A N/A lever:2 pedal:2 MIDI pedal MIDI

Keyboard

Key Pressure Chord Memory External Control External Sustain Key Scaling Velocity Curves
channel no MIDI pedal MIDI 1 4

Source

Name Signal Class Waveform Octave Range Amplitude Modulator Harmonics Modulator Pitch Modulator Wave Assign Modulator
VCO1 analog triangle saw pulse (mix) +2 -3 key Lag velocity release-velocity aftertouch TrackingGen1-3 Ramp1-4 EG1-5 Pedal1-2 LFO1-5 Vibrato Lever1-2 FM:VCO2 PWM: key Lag velocity release-velocity aftertouch TrackingGen1-3 Ramp1-4 EG1-5 Pedal1-2 LFO1-5 Vibrato Lever1-2 portamento glissando key Lag velocity release-velocity aftertouch TrackingGen1-3 Ramp1-4 EG1-5 Pedal1-2 LFO1-5 Vibrato Lever1-2 no
VCO2 analog triangle saw pulse noise (mix) +2 -3 key Lag velocity release-velocity aftertouch TrackingGen1-3 Ramp1-4 EG1-5 Pedal1-2 LFO1-5 Vibrato Lever1-2 sync:VCO1 PWM: key Lag velocity release-velocity aftertouch TrackingGen1-3 Ramp1-4 EG1-5 Pedal1-2 LFO1-5 Vibrato Lever1-2 portamento glissando key Lag velocity release-velocity aftertouch TrackingGen1-3 Ramp1-4 EG1-5 Pedal1-2 LFO1-5 Vibrato Lever1-2 no

Filter

Name Signal Class IC Resonant Shape Frequency Modulator Resonance Modulator Shape Modulator
VCF analog CEM3372 or CEM3320 yes low-pass:6|12|18|24dB high-pass:6|12|18dB band-pass:12|24dB notch phase-shift [low-pass:6dB + high-pass:12dB|18dB | notch | phase] VCO2 Vibrato Lever1-2 Pedal1-2 key Lag velocity release-velocity aftertouch EG1-5 LFO1-5 TrackingGen1-3 Ramp1-4 key Lag velocity release-velocity aftertouch TrackingGen1-3 Ramp1-4 EG1-5 Pedal1-2 LFO1-5 Vibrato Lever1-2 no

Envelope

Name Level Rate Loop Polarity Trigger Level Modulator Rate Modulator
EG1 sustain delay attack decay release repeat no single multi LFO external gate no key Lag velocity release-velocity aftertouch TrackingGen1-3 Ramp1-4 EG1-5 Pedal1-2 LFO1-5 Vibrato Lever1-2
EG2 sustain delay attack decay release repeat no single multi LFO external gate no key Lag velocity release-velocity aftertouch TrackingGen1-3 Ramp1-4 EG1-5 Pedal1-2 LFO1-5 Vibrato Lever1-2
EG3 sustain delay attack decay release repeat no single multi LFO external gate no key Lag velocity release-velocity aftertouch TrackingGen1-3 Ramp1-4 EG1-5 Pedal1-2 LFO1-5 Vibrato Lever1-2
EG4 sustain delay attack decay release repeat no single multi LFO external gate no key Lag velocity release-velocity aftertouch TrackingGen1-3 Ramp1-4 EG1-5 Pedal1-2 LFO1-5 Vibrato Lever1-2
EG5 sustain delay attack decay release repeat no single multi LFO external gate no key Lag velocity release-velocity aftertouch TrackingGen1-3 Ramp1-4 EG1-5 Pedal1-2 LFO1-5 Vibrato Lever1-2
Ramp1 - attack no no single multi LFO external gate no no
Ramp2 - attack no no single multi LFO external gate no no
Ramp3 - attack no no single multi LFO external gate no no
Ramp4 - attack no no single multi LFO external gate no no

LFO

Name Waveform Delay Polarity Sync Delay Modulator Level Modulator Rate Modulator
LFO1 saw:up|down square triangle random noise sample:mod-source via Tracking Generator off single multi external lag key Lag velocity release-velocity aftertouch TrackingGen1-3 Ramp1-4 EG1-5 Pedal1-2 LFO1-5 Vibrato Lever1-2 key Lag velocity release-velocity aftertouch TrackingGen1-3 Ramp1-4 EG1-5 Pedal1-2 LFO1-5 Vibrato Lever1-2
LFO2 saw:up|down square triangle random noise sample:mod-source via Tracking Generator off single multi external lag key Lag velocity release-velocity aftertouch TrackingGen1-3 Ramp1-4 EG1-5 Pedal1-2 LFO1-5 Vibrato Lever1-2 key Lag velocity release-velocity aftertouch TrackingGen1-3 Ramp1-4 EG1-5 Pedal1-2 LFO1-5 Vibrato Lever1-2
LFO3 saw:up|down square triangle random noise sample:mod-source via Tracking Generator off single multi external lag key Lag velocity release-velocity aftertouch TrackingGen1-3 Ramp1-4 EG1-5 Pedal1-2 LFO1-5 Vibrato Lever1-2 key Lag velocity release-velocity aftertouch TrackingGen1-3 Ramp1-4 EG1-5 Pedal1-2 LFO1-5 Vibrato Lever1-2
LFO4 saw:up|down square triangle random noise sample:mod-source via Tracking Generator off single multi external lag key Lag velocity release-velocity aftertouch TrackingGen1-3 Ramp1-4 EG1-5 Pedal1-2 LFO1-5 Vibrato Lever1-2 key Lag velocity release-velocity aftertouch TrackingGen1-3 Ramp1-4 EG1-5 Pedal1-2 LFO1-5 Vibrato Lever1-2
LFO5 saw:up|down square triangle random noise sample:mod-source via Tracking Generator off single multi external lag key Lag velocity release-velocity aftertouch TrackingGen1-3 Ramp1-4 EG1-5 Pedal1-2 LFO1-5 Vibrato Lever1-2 key Lag velocity release-velocity aftertouch TrackingGen1-3 Ramp1-4 EG1-5 Pedal1-2 LFO1-5 Vibrato Lever1-2
Vibrato saw:up|down square triangle random noise yes key Lever2 Pedal2 Lever2 Pedal2
Conventional Models
SEM TVS-1a TVS-1 FVS-1 EVS-1 OB-1 OB-X OB-SX
OB-Xa OB-8 Matrix-12 Xpander Matrix-6 Matrix-6R Matrix-1000

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