Replay Polyphonic Synthesizer (Black)

Vongon stepped into synths with this gem, channeling the warm, nostalgic vibe of 80s classics like the Roland Juno and Korg Polysix into a super compact black aluminum chassis that fits right on your pedalboard.

At its core is a 6-voice virtual analog engine with a single oscillator per voice offering ramp, square, sine, or triangle waves, plus PWM for squares, white noise (or external input via alt menu), and a versatile LFO with 7 waveforms that can modulate pitch, filter, or pulse width. Everything flows into a resonant 4-pole lowpass filter with cutoff, resonance, envelope amount, key tracking, and LFO mod, followed by a VCA and snappy ADSR envelope for organic articulation. You'll find 22 dedicated sliders and Rogan knobs up top, a 2.5-octave keyboard with hot-swappable Cherry MX mechanical keys for that satisfying click, and a multimode arpeggiator (up/down/order/random, 1-3 octaves, MIDI sync) that's a blast for instant patterns. Connectivity shines with balanced 1/4" audio in/out, 3.5mm MIDI in/out, USB-C, and 9VDC power—plus a web interface for 31 presets and deeper tweaks.

Players love how hands-on and immediate it feels for pads, leads, arps, and bass, praising the filter's bite and build quality, though some note the single-osc simplicity keeps it focused rather than sprawling.