3GP to AU Converter

Get AU audio out of 3GP videos quickly online

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No Installation

The converter runs entirely in your web browser. No plugins, no apps, no downloads — just open convertio.tools and start converting immediately.

Soundtrack Capture

Grab the audio layer from 3GP recordings and store it as AU. Perfect for isolating music, dialogue, or ambient sound from video footage.

Audio Controls

Set bitrate, sample rate, and channel configuration before conversion. Shape the audio output to match your exact playback or production needs.

How to convert 3GP to AU

1

Select files from Computer, Google Drive, Dropbox, URL or by dragging it on the page.

2

Choose au or any other format you need as a result (more than 200 formats supported)

3

Let the file convert and you can download your au file right afterwards

About formats

3GP is a multimedia container format defined by the 3rd Generation Partnership Project as the standard media format for 3G mobile services. Based on the ISO base media file format (MPEG-4 Part 12), it was designed to reduce storage and bandwidth requirements so that mobile phones with limited capabilities could efficiently capture, store, and play video content. The format typically uses H.263 or H.264 video codecs paired with AMR-NB, AMR-WB, or AAC audio. 3GP was instrumental in bringing multimedia to mobile devices during the early smartphone era, when network speeds and device hardware imposed tight constraints on file sizes. The streamlined container strips away overhead found in full MP4 files, resulting in significantly smaller files that stream reliably over slow 3G connections. 3GP supports both GSM and UMTS network protocols and includes provisions for timed text and still images within the container. Broad adoption by major handset manufacturers ensured that practically every 3G-capable phone could handle 3GP media natively. Although modern mobile devices now favor MP4 and other advanced formats, 3GP files are still encountered in archives of older mobile recordings and in regions where bandwidth-efficient video delivery remains important.
Initial release: 2003
AU is an audio file format introduced by Sun Microsystems for its Unix workstations and the NeXT platform. It features a minimal 24-byte header specifying data offset, size, encoding type, sample rate, and channel count, followed by the audio payload. AU supports numerous encodings, including uncompressed linear PCM at various bit depths, mu-law and A-law companding (logarithmic compression used in telephone systems), and several ADPCM variants. This versatility made AU a workhorse across early Unix environments, web audio (Java applets defaulted to AU), and telephony applications. One advantage is simplicity: the compact header and straightforward structure make it trivial to parse, generate, and stream programmatically. The built-in mu-law option provides another benefit, delivering reasonable voice quality at just 8 KB per second — half the rate of 16-bit uncompressed audio — invaluable when storage and bandwidth were scarce. Although modern formats have largely supplanted AU in consumer applications, it retains a foothold in scientific computing and audio processing pipelines where minimal overhead and reliable cross-platform behavior are valued.
Developer: Sun Microsystems
Initial release: 1992

Frequently Asked Questions

Why convert 3GP to AU?

AU is used in particular professional or legacy systems. Moving 3GP audio to AU ensures compatibility with applications that depend on this format.

What software plays AU?

Open AU using SoX, Audacity, and Unix/Linux audio tools natively supported on Sun/NeXT systems.

Will the entire audio track be extracted?

All audio from the 3GP source is captured in the AU output. The conversion preserves the full duration of the original soundtrack.

Is the conversion private and secure?

We take privacy seriously — uploaded 3GP files are erased once converted, and AU outputs are automatically deleted within 24 hours.

Do I need to install anything?

Nothing to install — everything happens in the browser. Open convertio.tools, upload your 3GP, and receive the AU without any software setup.

Can I convert 3GP to AU on my phone?

Absolutely. The converter runs entirely in your mobile browser on iOS or Android — upload 3GP, pick AU, and save the output to your device.

3GP to AU Quality Rating

3.8 (7 votes)
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