A 16×16 grid of LEDs turns the Tenori-On into a light show, but this shiny metal tablet is an intriguing synthesizer-sequencer combo. Each LED is a button, and each button holds a sound. Ten function buttons on the sides provide access to different effects, octaves, tempo, and volume. Experimentation with programming and playback variations using the Tenori-On is meant to be intuitive and fun. And perhaps mesmerizing for anyone watching the lights.