> For the complete documentation index, see [llms.txt](https://lados-organization.gitbook.io/goku/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://lados-organization.gitbook.io/goku/chapter-14-the-audio-system.md).

# Chapter 14: The Audio System

The `AudioPlayer` struct forms the core of the audio system for this game. This system uses the `sdl2::mixer` module from the `SDL2` library in Rust. It can load and play `.mp3`, `.flac`, `.mod`, and `.ogg` audio files. The `AudioPlayer` struct contains a single field - `mixer_context`.

An `AudioPlayer` is instantiated with a specific number of channels (`numchans`). The constructor function (`new`) initializes SDL2, opens an audio device with a specific frequency, chunk size, and number of channels.

It provides a method `play` that loads an audio file, plays it in a loop a given number of times and sets its volume. The `play` method returns a `Channel` that can be paused, resumed, or stopped using the respective methods in `AudioPlayer`.

When an `AudioPlayer` instance is dropped, it ends the currently playing music and prints a message to the console.