Here’s a video of an EPUB
I’m working with Adilei’s practice materials recordings. Each song in those materials has four mp3 files - one with the balanced mix, then one each with the 3 voices in the foreground.
They are packaged in an EPUB file and have clickable play buttons for each clip starting each phrase or verse.
The EPUB validates but needs JavaScript and audio APIs in the reading system to be displayed as designed.
