[PD] is [sigmund~] a "phase vocoder"?

[Alexandre Torres Porres]

Hi, just get things straight and confirmed, for quite a while now I have
included [sigmund~] into a "phase vocoder" section of my tutorial.

I never check and I'm just guessing it uses what is called "phase vocoder
analysis" to find accurate pitches and that can be used in a bank of
oscillators and I see that a so called "phase vocoder" is also used for
reconstructing signals with an oscillator bank.

Who could confirm or deny this? :)

Please point me to references if you can.

Thanks
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