� WSOLA fundamentally does time-scaling.� time compression or time stretching without changing pitch.� time-scaling is not normally thought of as real-time because your input and output buffer pointers will collide. combining time-scaling with resampling can make a pitch shifter (changes pitch without changing speed or tempo) and that **can** and often is real-time.� whatever stretching or compression the time-scaler does that changes the length of the sound is undone by the resampling.� it's like if you pitch it up an octave, the time-scaler (WSOLA or phase-vocoder or whatever technique) makes your audio twice as long (and half as fast) without changing pitch.� then you play that elongated audio back at twice the speed which brings it back to the original tempo but the pitch is bumped up an octave. for playback of audio from a hard disk or some other mass storage, you can use WSOLA or slow down or speed up the playback (without changing pitch) but your playback device has to output more samples than normal if you're speeding it up or fewer samples than normal to slow it down.� then, in real-time, you can use the time scaler� make the more or fewer samples per block to be the same as normal. -- r b-j ---------------------------- Original Message ---------------------------- Subject: [music-dsp] WSOLA on RealTime From: "Alex Dashevski" <alexd...@gmail.com> Date: Wed, September 26, 2018 3:25 pm To: music-dsp@music.columbia.edu -------------------------------------------------------------------------- > Can I implement WSOLA on realtime(audio buffer) ? > I need to do resampling ? Right ? > > Thanks, > Alex > _______________________________________________ > dupswapdrop: music-dsp mailing list > music-dsp@music.columbia.edu > https://lists.columbia.edu/mailman/listinfo/music-dsp � � � -- r b-j� � � � � � � � � � � � �r...@audioimagination.com "Imagination is more important than knowledge." � � � �
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