Looks like there's a link to a python implementation on this topics page, might provide some insights: https://github.com/topics/pitch-tracking
On Wed, Mar 6, 2019 at 6:44 PM robert bristow-johnson < r...@audioimagination.com> wrote: > > > Hay, any peeps around here that use YIN? or pYIN? > > Some of you who hang around the DSP Stack Exchange might know that I am > unimpressed with YIN, namely that I don't think there is anything novel > about it (w.r.t. Average Squared Difference Function, ASDF) other than this > so-called "Cumulative Mean Normalized Difference Function"(CMNDF) which > seems to have the only purpose to prevent choosing the lag of 0 as the > best-fit lag. Big Deeeel. There are other ways to do that, and otherwise > the CMNDF just fucks up the ASDF result, at least a little, at the lags > around the period length. And ASDF is still the measure of best fit. Here > is where I complain a little about YIN: > > > https://dsp.stackexchange.com/questions/51823/yin-pitch-estimation-algoritm-simplified-explanation/51842#51842 > > Here is a copy of the original YIN: > > [Cheveigne A, Kawahara H. - *YIN, a fundamental frequency estimator for > speech and music*](http://audition.ens.fr/adc/pdf/2002_JASA_YIN.pdf ) > > and the new, improved probabilistic YIN: > > [Mauch M, Dixon S. - *PYIN: A fundamental frequency estimator using > probabilistic threshold distributions*]( > http://matthiasmauch.de/_pdf/mauch_pyin_2014.pdf ) > > Now, while I don't want to use YIN to find pitch candidates (I think I do > a better job of it with just the ASDF), I am curious about pYIN in what > exactly they do with the pitch candidates. I understand Hidden Markov > Models, or at least I used to, but I do not know what Mauch and Dixon do to > actually pick the final candidate. Has anyone else slogged through this > enough to understand what hey are doing? How do they connect a candidate > from the previous frame to a candidate of the current frame?, and then, how > does pYIN score each candidate and choose the candidate that will be output > as the pitch? > > If anyone worked on this, please lemme know. > > > -- > > r b-j r...@audioimagination.com > > "Imagination is more important than knowledge." > > > > > > > > _______________________________________________ > dupswapdrop: music-dsp mailing list > music-dsp@music.columbia.edu > https://lists.columbia.edu/mailman/listinfo/music-dsp
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