An HTML/JS app for performing a "spectral freezing" effect on any audio file supplied. There are 24 sub-bands to play with, and the user can freeze and unfreeze parts or all of the spectrum as the sound plays.
Shout-outs again to katspaugh, author of the excellent wavesurfer.js on which this app is built, and to Chris Cannam for the web-assembly implementation of the FFT.
Marco Gomez designed the CSS "vertical flip switches" that control the filterbank.