autotune

BTS songs are Heavily covered with autotune. They have the worst vocal line in kpop and the rappers sound like dying goat.

autotune
/ˈɔ təʊtju n/
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nounTRADEMARK
a device or facility for tuning something automatically, especially a piece of computer software that enables the correction of an out-of-tune vocal performance.

Autotune: Bts songs are full of autotune and they only reason they are up in the charts are because of the mass buying impact.