AU to SND Converter

Transform your AU recordings into SND online

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Cross-Platform

Convert AU to SND on any operating system through your web browser. Works equally well on desktops, laptops, and phones.

Quick and Easy

No complicated settings needed. Drop your AU into the converter, choose SND, and the converted file is ready in moments.

Fast Results

The AU to SND conversion engine is optimized for speed. Most audio files are processed and ready to download within seconds.

How to convert AU to SND

1

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

2

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

3

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

About formats

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
SND is a multi-platform audio file extension used across several computing ecosystems since the late 1980s. On Sun and NeXT workstations, .snd files follow the AU format structure — a header with magic number 0x2e736e64, data offset, encoding type, sample rate, and channel count, followed by raw audio. On MS-DOS PCs, the same .snd extension was used by early sound utilities like Sounder and SoundTool for simple 8-bit unsigned PCM recordings. Macintosh systems also employed .snd for sound resources embedded in the resource fork. Because the extension is shared across incompatible formats, audio processing tools typically inspect the file header to determine which variant they are handling: files beginning with the AU magic number are treated as Sun/NeXT audio, while headerless files are interpreted as raw PCM with assumed parameters. The Sun/NeXT variant supports multiple encodings including mu-law, A-law, 8-bit and 16-bit linear PCM, and ADPCM, making it versatile for both speech and general audio. One advantage of the AU-style SND is its self-describing header, which enables any compliant player to determine sample format and rate without external metadata. The MS-DOS SND variants hold historical value as artifacts of the era when Sound Blaster cards first brought digital audio to personal computers. SND files from all platforms can be processed and converted using SoX and other audio tools.
Initial release: 1988

Frequently Asked Questions

Why convert AU to SND?

The AU format lacks modern audio features. Switching to SND gives you better codec support and wider device compatibility.

Which software plays SND?

Use Audacity, SoX, various audio utilities to play or edit SND recordings. These tools offer reliable compatibility with the format.

How is audio fidelity handled during conversion?

The converter preserves maximum fidelity. If SND is lossless, no data is discarded. Lossy codecs apply minimal perceptible compression.

Does the converter support batch AU conversion?

Absolutely. You can upload a batch of AU files and convert them all to SND together, saving significant time on large collections.

What happens to my files after conversion?

Your original AU is deleted as soon as conversion ends. The resulting SND is available for download and automatically removed within 24 hours.

Can I use this on a Chromebook or tablet?

Yes. The converter runs in any modern web browser. There are no platform restrictions — Chromebooks, tablets, and phones all work fine.

AU to SND Quality Rating

5.0 (2 votes)
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