The **midi‑file** package provides a lightweight JavaScript/TypeScript library for parsing standard MIDI files into a plain‑object representation and writing that representation back to raw byte arrays. It’s aimed at developers who need to read, edit, or generate MIDI data in Node.js, browsers, or any environment that can work with array‑like buffers, offering options to control format ambiguities (e.g., running status, note‑off encoding).