In this video, I used markers to trigger property animations and also tested out a custom text animation.
1) I created expressions that rotated, moved, and displayed effects at every marker key and then went to town creating markers in step with the song's beat.
2) I created a custom text effect that changed an initial string value into a final string value with the "help" of a function I defined.
Array Wonder Tool
Recognizing my need to be able to extract, manipulate, import, and save maker data with ease, I built the following tool: