AU to PAF Converter

Browser-based AU to PAF audio converter

Drop files here. 1 GB maximum file size or Sign Up
to
Facebook Amazon Microsoft Tesla Nestle Walmart L'Oreal

Advanced Options

Configure codec, sample rate, bit depth, and channel count to tailor the AU to PAF conversion to your exact needs.

Effortless Workflow

Upload your AU, pick PAF as the target, and download the result. Three steps, no learning curve, no registration wall.

Batch Processing

Upload multiple AU files at once and convert them all to PAF simultaneously. No need to repeat the process file by file.

How to convert AU to PAF

1

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

2

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

3

Let the file convert and you can download your paf 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
PAF (Paris Audio File) is the native audio format of the Ensoniq PARIS (Professional Audio Recording Integrated System) digital audio workstation, developed by Ensoniq in the late 1990s. PARIS was a hardware/software DAW that earned a loyal following among recording engineers for its warm analog-like sound and reliable operation, with PAF serving as its primary working file container. The format stores uncompressed PCM audio at 16-bit or 24-bit resolution and standard professional sample rates (44.1, 48, and 96 kHz), preserving full fidelity without lossy compression. PAF uses a straightforward binary layout — a compact header followed by interleaved sample data — enabling efficient real-time read and write during recording sessions. One notable advantage is support for both big-endian and little-endian byte ordering, reflecting the PARIS system's cross-platform roots on Mac and PC. After Ensoniq's acquisition by E-mu Systems and then Creative Technology, the PARIS DAW was discontinued, but PAF files remain important for studios with archived projects in this format. Tools like SoX and libsndfile can read and convert PAF files, ensuring long-term accessibility.
Developer: Ensoniq
Initial release: 1998

Frequently Asked Questions

Why convert AU to PAF?

AU files are tied to UNIX and Java ecosystems. Converting to PAF makes your audio accessible on any platform.

Which software plays PAF?

Use Ensoniq PARIS workstation, SoX, audio converters to play or edit PAF recordings. These tools offer reliable compatibility with the format.

How is audio fidelity handled during conversion?

The converter preserves maximum fidelity. If PAF 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 PAF 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 PAF is available for download and automatically removed within 24 hours.

Does the converter work on mobile devices?

Yes. The AU to PAF converter runs entirely in a web browser, so it works on smartphones, tablets, laptops, and desktops alike.