I don't know much about the Shepard scale. Regarding a pitch classifier machine, typically algorithms for pitch classification/tracking/detection focus only on

I don't know much about the Shepard scale. Regarding a pitch classifier machine, typically algorithms for pitch classification/tracking/detection focus only on the fundamental frequency (or f0) of the input sound wave. So, _technically_ pitch and f0 are used interchangeably where they shouldn't be. I have yet to see a pitch classifier machine that tries to implement the special workings of the human auditory system.