A2 Analog Synthesizer

Introduced in 2019 by Italian builder GRP, this analog monosynth stands out with its stereo-capable state variable filter, letting you route lowpass to the left output and highpass to the right for immersive sweeps that feel alive in any mix.

At its core are two voltage-controlled oscillators, each with five waveforms—VCO1 adds PWM on select shapes, while VCO2's Shape control stacks nine copies for lush super-saw or super-triangle tones. A built-in ring modulator, white noise generator, and mixer feed into the 12dB/oct multimode filter (lowpass, highpass, bandpass, notch) with keyboard tracking, resonance that sings formant-like vocals, and onboard distortion for grit. Modulation is deep with two voltage-controllable LFOs, sample & hold, a looping multi-stage AHDSR envelope, a standard AD/R envelope, arpeggiator, and a flexible mod matrix where osc freq, filter cutoff, and more respond to 11 sources. Hands-on controls cover everything from master tuning and portamento to aftertouch and velocity, with glowing VU meters, CV/gate/ clock ins, MIDI in/thru (DIN and USB for upgrades), and dual 1/4" TRS outs—all in a sturdy desktop/rackmount chassis that feels premium for jamming or studio integration.

Players love its clean, precise "modern" analog voice and top-notch build, often calling out the filter's character and modulation depth as reasons it punches above its weight against pricier monosynths, though some note the demos don't always capture its full potential.