Here is the media player I wrote in JavaScript: https://github.com/prettydiff/mp3-master-list/blob/master/lib/browser.ts https://github.com/prettydiff/mp3-maste

Here is the media player I wrote in JavaScript: https://github.com/prettydiff/mp3-master-list/blob/master/lib/browser.ts https://github.com/prettydiff/mp3-master-list/blob/master/li... I suspect there exist filters in the browser APIs to adjust play back timing and rate. I have not attempted to modify the media in that way myself but I did see API filters to alter stero panning, tonal quality, wave shape, biquad, delay, and more.