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ARP Solus

Analog monophonic synthesizer

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Solus 1Solus 2
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ARP Solus
ARP Solus
1 000.00 street price

Solus is an instrument aimed at touring musicians, for situations where every centimeter is important, and a rigid case must protect the content reliably. The synthesizer is assembled in a wooden housing with a convenient handle for transportation. The synthesizer is quite rare: the assembly was done manually, and its production began only a year before the bankruptcy of ARP.

To build the sound, two voltage controlled oscillators (VCO) were used with the choice of waveform (meander/saw) by the slider, which makes it possible to achieve both "pure" forms and intermediate, blended ones. Both VCOs are subject to master and octave switch control, an independent tuning controller and an octave switch (+1, +2 the main switch) are also available for VCO2. For each of the oscillators, pulse-width modulation (PWM) is available carried out by the envelope generator signal or LFO. For VCO2, frequency modulation (FM) is also available by the envelope generator or LFO signal, and the hard-sync mode with VCO1.

In the mixer section one slider can simultaneously set both the balance of the two oscillators and the mode of ring modulating of the signal VCO1 on VCO2 or the signal of an external source.

The voltage controlled low-pass filter (LP VCF) has frequency, resonance and depth adjustment of the modulation signal by the LFO, the envelope generator (with polarity selection), the CV signal from the keyboard.

The voltage controlled amplifier has only one setting - the depth of the envelope generator signal's influence.
The envelope generator uses a typical for ARP synthesizers of that period circuit with the ability to set ADSR parameters.
The single LFO produces a sine signal ranging from 0.2 to 20 Hz. Its signal is used for pulse-width and frequency modulation of VCO, modulation of VCF, and also for constructing the vibrato effect.

Solus has six "tiny jack" connectors for CV, gate and trigger control signals inputs and outputs, which allows using the synthesizer together with modular synthesizer systems or MIDI-CV converters.

The sound of ARP Solus can be heard in the works of Tangerine Dream.

Country of origin / production: USA

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Usage area
Synthesizer 
Modular System 
Usage Design/ Form Factor
With Keys 
Archetype
Analogue (A) 
Polyphony
Monophonic 
Tone Generator / Sound Synthesis
Oscillator Type VCO (Voltage Controlled Oscillator)
Oscillators per voice2
Waveform/ Spectral form (main generator) Pulse Width Modulation (PWM)
Waveform/ Spectral form (main generator) Saw
Filter
Voltage Controlled Filter (VCF) 
Low-pass Filter (LPF) 
4-pole 
24dB 
Resonance 
Envelope Generator (EG)
FilterADSR
AmpADSR
Effects
Vibrato 
Arpegiator/ Portamento
Portamento 
Keys
Type Synth Action
Size3
Number of Keys37
Built-in controllers
Pitch Bend Wheel 
Modulation Wheel 
External controllers
CV in1
Gate in1
CV out1
Gate out1
Audio out
Mono 
Analogue: 1/4" (6.35mm)2
Audio in
Analog 1/4"1
Power
Voltage 220V
Voltage 110V
Voltage 50-60Hz
Power Supply Built-in, internal
Dimensions
Height165
Width635
Depth406
Weight9.97 kg
Case/ body
Metal&wood 
Color
Black 
Production start1980
Production end1981
Production ended

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