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https://www.guitarworld.com/gear/tc-electronic-announces-polytune-3-next-generation-polyphonic-tuning
TC Electronic Announces PolyTune 3, the Next Generation of Polyphonic Tuning | Guitar World
Apr 25, 2017 - TC Electronic has announced PolyTune 3, the latest evolution of its polyphonic tuner pedal.
the next generation