I built a simple phase vocoder as part of a college project in a Numerical Methods in Physics class! I wonder whether Auto-Tune was invented pretty much as soo

I built a simple phase vocoder as part of a college project in a Numerical Methods in Physics class! I wonder whether Auto-Tune was invented pretty much as soon as was possible. On the one hand, the phase vocoder, on which Auto-Tune is based, was invented in 1966[1]. On the other hand, it seems that its output was quite objectionable (lacking clarity, for one) until at least the mid-1980s and possibly longer. I wonder what 80s music with the Auto-Tune effect would have been like... [1] https://en.wikipedia.org/wiki/Phase_vocoder https://en.wikipedia.org/wiki/Phase_vocoder