This is a very cool blog, I need to spend some time with it. It's also interesting to draw parallels between the graphics stuff that Alex writes about to the audio realm.
Traditional FIR/IIR filtering is ubiquitous but actually does suffer from drawbacks such as phase distortion and the inherent delay involved. FFT filtering is essentially zero-phase, but instead of delays due to samples, you get delays due to FFT computational complexity instead. On Wed, Mar 4, 2020, 7:56 AM Spencer Russell <s...@media.mit.edu> wrote: > On Tue, Mar 3, 2020, at 4:21 PM, robert bristow-johnson wrote: > > > Like a lotta things, sometimes people use the same term to mean something > different. A "phase vocoder" (an STFT thing a la Portnoff) is not the > same as a "channel vocoder" (which is a filter bank thing). > > > It’s maybe worth noting that the STFT _is_ a filter bank where each > channel is sampled at the hop size and the bandwidth of each band pass > filter is just the Fourier transform of the windowing function. There’s > some phase twiddling you can do to convert between a modulated or > demodulated filter bank. > > -s > _______________________________________________ > dupswapdrop: music-dsp mailing list > music-dsp@music.columbia.edu > > https://urldefense.proofpoint.com/v2/url?u=https-3A__lists.columbia.edu_mailman_listinfo_music-2Ddsp&d=DwICAg&c=slrrB7dE8n7gBJbeO0g-IQ&r=w_CiiFx8eb9uUtrPcg7_DA&m=wcymP5JMDQ6nmTKKb1JaORXexaD2h-9hKirDMKv6ThY&s=3MHKW5VQeMC3BYBKg0rjyq0ep3gs4iI56ewvG-XrTMI&e=
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