Surprisingly, googling for mq synthesis produces fewer results than I thought. It's not very recent but my understanding is that it was the relatively modern approach to a phase vocoder. I didn't find any library implementing it but I found a couple older papers about it.
https://www.ll.mit.edu/publications/journal/pdf/vol01_no2/1.2.3.speechprocessing.pdf http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.21.8075&rep=rep1&type=pdf Does anybody else know more about whether mq analysis/synthesis has been left behind by the industry? I'm also not familiar with Serra's work on sinusoid + noise. Maybe it's the better algorithm. I'm also curious if anybody knows whether the melodyne/Antares class of algorithms have a speech model in them. I'm unclear if OP wanted pitch shifting for instrumental music or not, but I'm definitely curious about the state of the art for musical frequency/scale modification for instrumental musical signals. -Stefan S On Sat, May 19, 2018, 13:35 RJ Skerry-Ryan <rr...@mixxx.org> wrote: > It may not be the state of the art, but RubberBand > <https://breakfastquay.com/rubberband/> is, I believe, the best open > source pitch shift / time stretch library out there at the moment, and can > run in realtime on modern CPUs. SoundTouch > <https://www.surina.net/soundtouch/> is another good option that is > cheaper to compute (and therefore easier to run in realtime on e.g. a > mobile CPU). > > Mixxx <http://mixxx.org/> uses both (giving the user the choice, since > they may want SoundTouch on older CPUs) for realtime pitch shifting and > tempo adjustment. > > On Sat, May 19, 2018 at 1:29 PM gm <g...@voxangelica.net> wrote: > >> >> >> Am 19.05.2018 um 20:19 schrieb Nigel Redmon: >> > Again, my knowledge of Melodyne is limited (to seeing a demo years >> > ago), but I assume it’s based on somewhat similar techniques to those >> > taught by Xavier Serra (https://youtu.be/M4GRBJJMecY)—anyone know for >> > sure? >> >> I always thought the seperation of notes was based on cepstrum? >> My idea is that a harmonic tone, comb like in the spectrum, is a peak in >> the cepstrum. (isn't it?) >> Probably then you can also track pitch by following a peak in the >> cepstrum. >> Not sure if this makes sense? >> I never tried Melodyne in person so I am not sure what it is capable of. >> >> >> >> _______________________________________________ >> dupswapdrop: music-dsp mailing list >> music-dsp@music.columbia.edu >> https://lists.columbia.edu/mailman/listinfo/music-dsp > > _______________________________________________ > dupswapdrop: music-dsp mailing list > music-dsp@music.columbia.edu > https://lists.columbia.edu/mailman/listinfo/music-dsp
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