The TC Electronic Polytune is great for gigging - one strum and you can see which of your strings need attention. It’s the first Polyphonic tuner, can be used for guitar or bass and can be set to your own pitch preferences. It also has a chromatic tuner and two different display modes - needle and stream. The PolyTune even features an ambient light sensor, which automatically matches the brightness of the LEDs to its surroundings, as well as true bypass.