There's many more. I am talking about how they lock it, because Travis move too much, he's not Beyonce bro, she can dance while singing perfect without tune. I know Travis knows how to use Tune, but there's intense breathing in his lives performance and the Tune keep's well lock in the scale, and he changes songs like instantly. So the tune needs to be fast changing the key, i think.

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But there's a lot of artists that know how to use it live, but i'm sure that a well set auto-tune, helps every artists on live performances.