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Grp Synthesizer A1

Portable analog synthesizer

Grp Synthesizer
SKU: 67865
  • Compact synth in well known GRP-quality
  • One VCO-design with pulse width modulation
  • OSC waveforms sawtooth, square, triangle, sub-OSC and noise
  • 18dB ladder lowpass filter with distortion and keytracking
  • Two LFOs with six waveforms each with symmetry control of sawtooth and square as well as sample & hold with random waveform (LFO 1) and three-stage speed control
  • ADSR envelope for volume/VCA with three-stage speed control and "drone mode" (like on the Roland SH2 i.e.)
  • 12 patch points for VCO, LFOs, filter, pulse width, volume/VCA and envelope as well as External-In
  • USB-Port for MIDI-functionality

Grp Synthesizer A1

Sintetizzatore analogico portatile

Grp A1 è uno strumento analogico desktop che può essere utilizzato come sintetizzatore compatto da tavolo o per completare un sistema Eurorack. Il sintetizzatore monofonico Grp A1 può essere usato come strumento musicale autonomo o può essere impiegato per filtrare segnali esterni all’interno del circuito risonante Low Pass 18dB VCF. La presenza di tre segnali interni (VCO, SUB e NOISE) garantisce potenza timbrica e facilità di utilizzo. Con i due Low Frequency Oscillator - LFO (il primo, integra un Sample & Hold S&H) e con l’Envelope Generator ADSR, è possibile scolpire il comportamento di modulazione ciclica o transiente. É possibile ottenere articolazioni indipendenti di VCF e VCA scegliendo per quest’ultimo uno dei comportamenti FILTER EG, GATE + REL, HOLD. Lo strumento può essere alimentato tramite un cavo USB di tipo C collegato ad un qualsiasi Power USB 2,5A Inoltre può essere estratto dal proprio cabinet per essere installato con semplicità in un qualsiasi sistema modulare EuroRack; è possibile alimentarlo usando i normali flat cable in dotazione ai sistemi EuroRack.

644,00 € 523,58 + VAT

  • No longer available

1 Customer evaluation

4,0/5

1 Comments

J
Ottimo
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Jean-Luc 04-06-2026

I own quite a few Eurorack synth voices — including the Intellijel Atlantis, Moog Mavis, Deckard’s Voice, Dreadbox Erebus Reissue, Doepfer A-111-6, and others — and the GRP A1 still manages to stand out with a character of its own. Even though it is a fairly classic East Coast synth architecture, it has a distinct sound and a very musical character. The sweet spots are easy to find, and it quickly becomes inspiring to play. My only real criticism is that the MIDI connection is lost once the module is integrated into a Eurorack case. However, during Superbooth 2026, a GRP representative told me that it is actually possible, with a bit of DIY work, to extract the small MIDI PCB from the original GRP enclosure and mount it behind a custom panel, allowing the MIDI functionality to remain available even after installing the module into a Eurorack system.

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