Explore the creation of zmusic, an Emacs implementation for composing endless looping music, in this engaging 10-minute conference talk. Delve into the speaker's journey of transforming an Android app feature into an Emacs-based solution, uncovering insights on Emacs text properties, font rendering, WAVE file format, and music theory along the way. Gain valuable lessons in programming and discover how to merge coding with musical creativity. Listen as Zachary Kanfer, an experienced Lisp coder and guitarist, shares his expertise and demonstrates the potential of making music within the Emacs environment.