Kastle 2 FX Wizard Handheld Modular Synthesizer

Hailing from Bastl's beloved Kastle family, this FX Wizard casts spells on your audio with nine stereo effects that twist signals into glitchy, immersive realms—perfect for pocket-sized chaos in a modular rig.

At its heart, it's a compact handheld unit—95 x 70 x 45 mm and just 132g—running stereo processing at 44kHz/16-bit, powered by USB-C or three AA batteries for 15-18 hours of untethered fun. Patch into stereo ins/outs (3.5mm jacks, headphone-ready up to 250 ohms) with +12dB gain handling up to 6Vpp signals, then dial TIME, FEEDBACK, and AMOUNT knobs (all attenuvertable for CV/S&H modulation), plus hidden FILTER (LP/HP in feedback) and stereo detuning for width. Switch among delay (1.15s max), flanger, freezer, panner, crusher, slicer, pitcher, replayer, and shifter via CV input; sync with TRIG, tap-tempo clock, or analog sync I/O. Onboard LFO (triangle/pulse outs, reset), patchable envelope follower, and programmable pattern generator (8-step CV/gate via web app) add modulation mayhem, with USB MIDI for clock/notes/CCs.

Since its late 2024 debut, players love its brutal, hands-on patchability and wild extremes—like tempo-synced glitches that surprise—though some note the plastic build prioritizes function over finesse.