So from the 1940s?
Pitch correction of some shape or form has existed since the 50s, even
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.
The sound you're probably referring to was auto tune which was originally designed in the 90s as pitch correction but most frequently sees use as a way to emulate a vocoder or talk box. Talk boxes have been used since the 1940s as have vocoder.
Talkboxes have been used in a
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of music prior to auto-tune's breakout in Cher's '98 believe.
This is basically an old man shouts at clouds complaint.