A1 Desktop Semi-Modular Analog Synthesizer

Imagine squeezing massive analog tone into a palm-sized powerhouse—that's the magic here, a true analog voice from Italy's GRP that punches way above its tiny footprint.

At its heart sits a single VCO pumping out triangle, sawtooth, and square waves, beefed up by a sub-oscillator and white noise generator, all feeding into a resonant 18dB/oct ladder lowpass filter with note tracking and built-in distortion for grit. Two LFOs—one with sample & hold—plus a versatile ADSR envelope let you modulate pitch, cutoff, and more, while onboard MIDI-to-CV handles USB and DIN inputs with glide and pitch bend. Six patch points open it up for external CV/gate, 1V/oct, or audio processing, and it's Eurorack-ready right out of the box, powered by USB-C or flat cables. The compact 6.75 x 5 x 2.25-inch metal chassis weighs just 1kg, with densely packed knobs and switches that reward careful tweaking.

Players love its thick, bright oscillator and characterful filter for killer basses, leads, and experimental FM weirdness, often calling out the musical distortion and nonlinear LFOs that unlock endless sweet spots. Sure, the fiddly controls can challenge live use or fat fingers, and the limited patching keeps it more desktop monosynth than full modular beast—but that no-frills focus delivers pro sound without the fluff.