Making Music! In Emacs?! by Zachary Kanfer During quarantine, I found myself spending time with an Android app. One of the features this app has is composing music that loops endlessly. As with many programs, I wondered how much better this feature would be, if only it was inside Emacs. This talk explains how I made zmusic, my implementation inside Emacs, with detours through Emacs text properties, font rendering, the WAVE file format, and music theory. And hopefully at the end, we’ll have something worth listening to. Zachary spends a lot of time coding Lisp, playing guitars, and doing improv. He also runs Emacs NYC, and recently got into hats. Find him at zck.org.