street pricePro/DGX is the third generation of Soloist synthesizers. Almost the same as Pro-Soloist, although it got a brighter face and the preset switches were replaced with buttons. The main difference from previous versions is in the filter section.
The first Soloist used VCF ARP4012. This filter is built entirely on discrete elements and has poor thermal stability (roughly speaking: the sound of the synthesizer strongly depends on the weather).
Pro-Soloist used a voltage controlled filter (VCF) ARP4034, built on transistors, combined in a single unit (CA3086). Such a solution made it possible to achieve greater thermal stability and at the same time to have the sound of a discrete transistor four-stage filter.
A newer ARP4075 filter was used in Pro/DGX. It is built according to a hybrid scheme (no, not digital, it is still analog) using transistors (2N5087) and operational amplifiers (LM3900N). This approach allowed the company to reduce the cost of the filter, but the sound was affected. Many users noted that although all presets were identical to PRO-Soloist, they sounded different (worse) due to another filter.
The synthesizer was produced from 1977 until ARP stopped production in 1981. Tangerine Dream and Keane are among the famous users.
Country of origin / production: USA
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| Usage area | |
|---|---|
| Synthesizer | |
| Usage Design/ Form Factor | |
| With Keys | |
| Archetype | |
| Analogue (A) | |
| Polyphony | |
| Monophonic | |
| Tone Generator / Sound Synthesis | |
| Oscillator Type | VCO (Voltage Controlled Oscillator) |
| Oscillators per voice | 1 |
| Waveform/ Spectral form (main generator) | Saw |
| Programs/ Voices/ Timbres | |
| Single Voice Preset | 30 |
| Filter | |
| Voltage Controlled Filter (VCF) | |
| Effects | |
| Distortion | |
| Vibrato | |
| Wah/ AutoWah | |
| Arpegiator/ Portamento | |
| Portamento | |
| Keys | |
| Type | Synth Action |
| Aftertouch | |
| Size | 3 |
| Number of Keys | 37 |
| Audio out | |
| Mono | |
| Analogue: 1/4" (6.35mm) | 1 |
| Power | |
| Voltage | 220V |
| Voltage | 110V |
| Voltage | 50Hz |
| Voltage | 60Hz |
| Power Supply | Built-in, internal |
| Case/ body | |
| Metal | |
| Color | |
| Black | |
| Production start | 1977 |
| Production end | 1981 |
| Production ended | |
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