AV1 to AU Converter

Extract Sun AU audio from AV1 video files online

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Unix Standard

AU is the native audio format for Sun/NeXT systems — converting from AV1 creates files for Unix applications and Java APIs.

Online Conversion

No Unix workstation needed — convert AV1 to AU in any modern browser and deploy the output wherever you need it.

Data Privacy

Your AV1 uploads are erased immediately, and AU files are purged from our servers within 24 hours.

How to convert AV1 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

AV1 (AOMedia Video 1) is an open, royalty-free video coding format developed by the Alliance for Open Media, a consortium whose founding members include Google, Mozilla, Microsoft, Amazon, Netflix, and Intel, among others. The specification was finalized in June 2018 with the goal of providing a next-generation video codec that surpasses the compression efficiency of H.264 and HEVC while remaining free from licensing fees. AV1 achieves roughly 30-50% better compression than HEVC at equivalent visual quality, making it particularly attractive for streaming platforms seeking to reduce bandwidth costs without sacrificing viewer experience. The codec supports a broad range of features including film grain synthesis, flexible tiling for parallel processing, content-adaptive resolution switching, and a rich set of intra and inter prediction modes. Hardware decoding support has expanded rapidly across mobile processors, GPUs, and smart TVs, addressing early concerns about computational demands during encoding. AV1 has seen wide adoption from major streaming services for delivering 4K and HDR content, and it serves as the video component of the WebM container for web-based playback. The royalty-free status makes AV1 especially important for open web standards and accessible media distribution.
Initial release: June 25, 2018
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 AV1 to AU?

AU is the standard audio format for Sun and NeXT systems — still used in Unix applications, Java sound APIs, and web audio.

What opens AU files?

Audacity, SoX, VLC, and Java-based applications handle AU audio. It is built into many Unix and Linux audio frameworks.

Is AU the same as SND?

AU and SND are essentially the same format — Sun Microsystems AU files and NeXT SND files share an identical structure.

What quality does AU offer?

AU supports both compressed (mu-law) and uncompressed (PCM) encoding at various sample rates and bit depths.

Is the conversion secure?

AV1 uploads are deleted right after processing. AU outputs are removed from our servers within 24 hours.