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Quartet

ARP Quartet

Quartet
Quartet (image courtesy of SoundDoctorin)

Released: 1979

MSRP: $1350US

Synopsis:

Rebadged Siel Orchestra ensemble synth with brass, piano, reed, and string sections (only brass is editable). Architecture Class: Conventional (subtractive).

Ebay Description:

The ARP Quartet is a 49 key analog ensemble synthesizer, featuring brass (trumpet/trombone), string (cello/violin), reed (organ/celeste), piano (piano/honky tonk) sections, with vibrato. The Brass and Piano/Reed sections have a variable attack, while the string section has a variable release. The Brass section also has "brilliance" control.

Physical

Form Factor Dimensions Weight Audio Input Audio Output Communication Port Control Input Control Output Switch Input Power
49 keys ? ? no high low no volume (5 pin DIN) no sustain wired

Interface

Compatibility Multitimbral Memory Program Memory External Storage External Programming UI Input UI Output
- no 4 presets no no buttons/sliders LED

Architecture

Multitimbral Polyphony Unison Architecture
4 full (divide down osc) no VCO->VCF->VCA

Output

Effects Pan Modulator Volume Modulator Headphone
none no EGs pedal:(5-pin-DIN) no

Control

Arpeggiator Arpeggiator External Sequencer Sequencer Memory Sequencer External Continuous Program Change
no no no N/A no no no

Keyboard

Key Pressure Chord Memory External Control External Sustain Key Scaling Velocity Curves
no no no yes no no

Source

Name Signal Class Waveform Octave Range Amplitude Modulator Harmonics Modulator Pitch Modulator Wave Assign Modulator
Brass analog saw Trombone:8' Trumpet:4' no no no no
Piano analog mix - no no no no
Reed analog mix - no no no no
String analog saw Cello:8' Violin:4' no no no no

Filter

Name Signal Class IC Resonant Shape Frequency Modulator Resonance Modulator Shape Modulator
BrassBrilliance analog opamps no band pass? no no no

Envelope

Name Level Rate Loop Polarity Trigger Level Modulator Rate Modulator
BrassEG - attack no no no no no
PianoReedEG - attack no no no no no
StringEG - release no no no no no

LFO

Name Waveform Delay Polarity Sync Delay Modulator Level Modulator Rate Modulator
LFO triangle no no no no no
Conventional Models
2600 Odyssey Odyssey2 Axxe Omni Omni-2 Avatar Solus
Quadra Quartet