The IK Multimedia UNO Synth is a single voice, dual-oscillator synthesizer with a multimode filter, two envelopes for the VCA and VCF, and a multi-waveform LFO. Each independent VCO offers saw, triangle, and pulse waveforms with variable shape, including pulse-width modulation (PWM). Additionally, a white noise generator can be added for noises sweeps, percussive sounds, and sound FX. The 2-pole OTA-based filter offers analog resonant modes with LP, BP, and HP selections. Other advanced features included a real-time and step-edit sequencer with 20 automatable parameters, as well as a 10-mode, 4-octave arpeggiator.

The onboard multitouch 27-note keyboard offers 14 scales plus a chromatic mode. To round out the instrument, a synchronized delay and 5 performance effects offer simple, yet effective, results. The UNO is self-tuning with auto-tune calibration. The rear panel offers USB MIDI via micro-USB and standard MIDI connectors via two (in/out) 5-pin DIN adapters. For audio connections, the UNO provides two 1/8" (3.5mm) connectors for input and output, allowing the unit to work with external gear, while connecting to headphones or a PA.

Complete MIDI implementation with all parameters and clock can be controlled via MIDI CC, while the Mac/Windows software editor/librarian allows you to create, store, and recall your own custom patches to any of the 80 onboard user preset slots. The IK Multimedia UNO can be powered by battery or via USB and includes four AA batteries, a micro-USB to USB cable, and two MIDI adapters.