What is MIME type "audio/atrac-advanced-lossless"?

A MIME type is a string that tells browsers and other tools how to handle a particular kind of file.

The MIME type audio/atrac-advanced-lossless denotes files that use an advanced lossless encoding method. It compresses audio data without any degradation to the original sound quality.
This technique was developed by Sony to combine efficient storage with high-fidelity audio.

Common products in this family include files like AT3, OMG, OMA, AA3, and AAL.

Key uses and characteristics include:

• Storage of high-quality audio while minimizing file size
• Usage in portable devices and digital audio players, especially in Sony ecosystems
• Preservation of the original recording’s details for archival and professional use

This format is ideal where conserving every nuance of the original sound is critical. For more details on MIME types, visit this reference.

Associated file extensions

.at3, .omg, .oma, .aa3, .aal

Usage Examples

HTTP Header

When serving content with this MIME type, set the Content-Type header:

    Content-Type: audio/atrac-advanced-lossless
  

HTML

In HTML, you can specify the MIME type in various elements:

    <a href="file.dat" type="audio/atrac-advanced-lossless">Download file</a>
  

Server-side (Node.js)

Setting the Content-Type header in Node.js:

    const http = require('http');
    
    http.createServer((req, res) => {
      res.setHeader('Content-Type', 'audio/atrac-advanced-lossless');
      res.end('Content here');
    }).listen(3000);
  

Associated file extensions

.at3, .omg, .oma, .aa3, .aal