Sounds like granular stretch, which has been in Csound for years Sent from Blue
On 2 Mar 2018, 14:26, at 14:26, Alan Wolfe <alan.wo...@gmail.com> wrote: >Someone was explaining some algorithms to me that I thought were >interesting. I was curious, is this granular synthesis? > >It seems to be but after i read this link >https://granularsynthesis.com/guide.php. I'm unsure if it is, or is >just >close... > >--Adjust Audio Length Without Affecting Frequency-- > >If you wanted to stretch a section of sound, you'd find a small section >of >sound (say 20 ms worth) in the region. > >If you wanted to double the sound length, you could double this section >of >sound. Similar for any integer multiple. > >For fractions of multiples > 1, you overlap the sections and mix them >(just >addition as per usual, but he also mentioned averaging as a >possibility) > >Presumably you would do this for every small section of sound in the >region >you want to adjust. > >He said he would cut these buffers at zero crossings to get rid of >clicks, >but I imagine using an envelope, or even doing a cubic hermite >interpolation could help here even more. > >--Adjust Audio Frequency Without Adjusting Length-- > >AKA for stuff like autotune. > >The idea would be similar. > >You'd get a small buffer, adjust it to be shorter or longer (doing some >form of resampling), letting the pitch change by whatever factor you >are >interested in. > >Then, you'd use the previously mentioned technique to adjust the length >back to what it was. > > >Besides confirming or denying that this is granular synthesis, does >anyone >have any observations or tips for approaching these techniques, or the >desired end results? > >Thanks!! > > >------------------------------------------------------------------------ > >_______________________________________________ >dupswapdrop: music-dsp mailing list >music-dsp@music.columbia.edu >https://lists.columbia.edu/mailman/listinfo/music-dsp
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