AudioBinary

`audio/aac`

AAC

Reference for audio/aac, the Advanced Audio Coding format offering better quality than MP3 at similar bitrates.

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Expected extensions: .aac

HTTP Content-Type Header

HTTP Header

Content-Type: audio/aac

Associated File Extensions

.aac

Quick Facts

MIME Type	audio/aac
Category	Audio
Type	Binary
Extensions	.aac

Common Usage

AAC provides better audio quality than MP3 at equivalent bitrates and is the default audio format for Apple products, YouTube, and many streaming services. It is used in iTunes, Apple Music, podcast distribution, and as the audio codec in MP4 video containers.

Code Examples

HTML

<!-- Link or embed with explicit type -->
<link rel="stylesheet" href="file.aac" type="audio/aac">

<!-- Or for script/media elements -->
<script type="audio/aac" src="file.aac"></script>

Node.js

// Express.js
app.get('/file', (req, res) => {
  res.type('audio/aac');
  res.send(data);
});

// Node.js http
res.writeHead(200, { 'Content-Type': 'audio/aac' });

nginx

# nginx.conf — add to types block or use default
types {
    audio/aac  aac;
}

# Or set for a specific location
location /api/ {
    default_type audio/aac;
}