AudioBinary

`audio/amr`

AMR

Reference for audio/amr, the Adaptive Multi-Rate audio codec optimized for speech in mobile telephony.

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Expected extensions: .amr

HTTP Content-Type Header

HTTP Header

Content-Type: audio/amr

Associated File Extensions

.amr

Quick Facts

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

Common Usage

AMR is a speech codec optimized for mobile telephony, offering good quality at very low bitrates (4.75-12.2 kbps). It is the standard codec for GSM and 3G voice calls, voicemail recordings, and MMS audio messages on mobile phones.

Code Examples

HTML

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

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

Node.js

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

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

nginx

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

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