TC-Helicon is a Canadian audio equipment manufacturer, a subsidiary of Danish company TC Electronic. TC-Helicon focuses on vocal harmonizers, pitch correction, monitor speakers, and other products for vocalists. The main harmonizer model's differences are the maximum number of voices produced, the amount of control over their pitch and formant, the number of different effects than can be applied to the main vocal and the ability to harmonize in different keys with the help of a MIDI keyboard.
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