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A comment on The Mathematical Genius of Auto-Tune. Parent comment

Re:The Mathematical Genius of Auto-Tune by soundwave106 on Monday October 16, 2017 @04:48PM (#15486531)
The patent for Autotune can be found here: https://www.google.com/patents/US5973252?dq=5,973,252

My (very non-expert) reading of the patent is that it uses sample reduction and some specific features of the periodic form of the human voice to simplify the math involved in the auto-correlation routine. Although this routine does seem to be unique as far as I know, I wouldn't be surprised if it shares similarities to other techniques to reduce correlation complexity.

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Re:The Mathematical Genius of Auto-Tune by hamiltonkibbe on Monday October 16, 2017 @05:21PM (#15486728)
Polyphase filters maybe? It's an approach used primarily in resampling, and its an easy way to skip a LOT of Multiply-by-zero-and-Accumulate-ing
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Re:The Mathematical Genius of Auto-Tune by nejenendn on Monday October 16, 2017 @09:32PM (#15488002)
It decoded to a phase vocoder on the nearest semitones.
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Re:The Mathematical Genius of Auto-Tune by dspig on Tuesday October 17, 2017 @02:35AM (#15489088)
read the patent - all time domain, no phase vocoder involved.
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