A developer's journey in building a serverless music app led to an exploration of Typed Arrays in JavaScript to handle binary data, specifically for generating MIDI files directly in the browser. Initially unfamiliar with Typed Arrays, the developer faced challenges with corrupted MIDI files when using the jsmidgen library in a client-side environment. Through trial and error, the developer discovered that encoding issues between JavaScript strings and MIDI files were causing extra bytes to be added, resulting in corruption. By leveraging Typed Arrays, the developer successfully ensured that the binary data was correctly represented, allowing valid MIDI files to be generated without needing a backend server. This experience illustrated the importance of understanding encoding schemes and provided insights into handling raw binary data within JavaScript, ultimately showcasing the power of Typed Arrays in managing low-level data operations directly in the browser.