The Big GRP Synthesizer A8
This is a demo of the big GRP Synthesizer A8.
The structure of the analog synthesizer is the following:
- 6 VCOs, temperature stabilized, with 3 FM sources (lin/exp) and 2 PWM sources.
- 6 SUB VCO with -1 and -2 octave selector.
- 2 RING MODULATORS
- 1 NOISE GENERATOR (White, Pink, Low Freq).
- 2 VCF Low Pass 24dB/Oct Transistor Ladder (Moog® style).
- 2 VCF State Variable 12dB/Oct with four modes (Oberheim® style, but with auto oscillation).
- 2 FIXED FILTER BANK 14 BAND (a la Moog® 914 module).
- 8 VCAS (three on the main audio signal path, the others for modulation).
- 3 AUDIO MIXERS.
- 1 AUTO PAN.
- 4 SIX STAGES ENVELOPE GENERATORS in DAHDSR configuration.
- 3 FOUR STAGE ENVELOPE GENERATORS in ADSR configuration.
- 2 VCLFO
- 1 PERFORMANCE LFO amplitude modulatable by Aftertouch or ModWheel.
- 1 Real SAMPLE & HOLD.
- 1 Full function (and complex) 8×2/16×1 STEP SEQUENCER syncable with MIDI, Int Clock, Ext Clock or whatever.
- Separate PORTAMENTO TIME for Upper and Lower sections.
- A-440 Hz reference tone.
- 1 Internal MIDI INTERFACE
The GRP modular synthesizer is an Italian Moog-style synthesizer. If you’ve used the GRP synthesizer, leave a comment with your thoughts!
via vigasan
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Tags: A8, Analogic, demo video, Grp, modular syntheszer, step sequencer, synth, synthesizer





Looks like it has a fixed signal path initially as I see no patch cables. I'm assuming you can repatch this? Sort of like the ARP 2600?
No, it's neither modular nor semimodular.
It IS beautiful however!
What's with the patch bay then?