TL;DR
Shiela Dixon has taken a traditional ballerina music box and transformed it into a modern marvel by integrating a microcontroller and audio playback system. The original music box used a simple clockwork mechanism with a comb and drum to produce sound, but Dixon replaced the comb with her new setup, allowing for a much larger repertoire of music. Instead of just playing pre-recorded tracks, her system samples each note from the original mechanism and plays them back in a way that mimics the traditional music box experience.