IK Multimedia's UNO Synth Pro sits in that sweet spot where analog warmth meets modern workflow—it's a paraphonic synth that doesn't ask you to choose between deep sound design and practical playability. The original UNO earned a reputation for punchy, characterful filters at a reasonable price point, and the Pro version doubles down on that philosophy while adding serious depth underneath.
The heart of the UNO Synth Pro is its three discrete analog oscillators with continuously variable waveshapes, letting you morph between waveforms smoothly rather than jumping between fixed shapes. Each oscillator can be hard-synced, frequency-modulated, or ring-modulated, and you get a white noise generator for texture and percussion. The real standout is the dual-filter architecture: one OTA filter modeled after the classic Roland Jupiter and Juno sound, paired with a VCA-based filter designed by Dave Rossum. Together they offer 24 different filter modes and can be routed in series or parallel, giving you everything from smooth sweeps to aggressive self-oscillating screams. The keyboard itself is built around 37 full-sized Fatar keys with aftertouch, and the whole unit measures 550 by 300 millimeters—compact enough for a desk but substantial enough to feel like a real instrument.
Control-wise, the UNO Synth Pro packs a modulation matrix with dedicated source, destination, and amount buttons for fast tweaking, two ADSR envelopes, two LFOs with fade-in control, a 64-step sequencer with automation for up to 24 parameters simultaneously, and a 10-mode arpeggiator. You get 256 user-editable presets, and song mode lets you chain presets together for longer compositions. The effects section includes a true-analog overdrive plus 12 studio-quality effects in three simultaneous slots—modulation, delay, and reverb—and external audio can be routed through the filters and effects for additional creative possibilities. Connectivity includes USB, MIDI in and out, CV and gate I/O for syncing with other gear, and balanced audio outputs plus headphone out.
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