Free online AU to TTA converter

Source format: AU

AU is a simple audio file format originally associated with Sun Microsystems and early Unix systems. It is commonly used for basic uncompressed or lightly compressed audio, especially in older software, legacy archives, and some technical or educational environments. AU files may contain mono or stereo audio and can use different encodings, but they are generally considered a legacy format today.

Target format: TTA

TTA stands for True Audio, a lossless audio format designed to compress audio without losing any quality. It is used by people who want smaller files while preserving the original sound exactly, such as audio archivists and enthusiasts. Compared with uncompressed formats, TTA offers good compression and bit-perfect playback, but support is more limited than for mainstream formats like FLAC or WAV.

How to perform the conversion

The most reliable way to convert AU to TTA is with a desktop audio converter or command-line tools that support both formats. If you want to convert the file online, you can use the 101convert.com website for free without installing any software.

Using FFmpeg is a practical option if your AU file is standard and readable by the tool:

ffmpeg -i input.au output.tta

Steps:

1. Install FFmpeg on your computer.
2. Open a terminal or command prompt.
3. Run ffmpeg -i input.au output.tta, replacing input.au with your source file name.
4. Check the output file in a player that supports TTA.

If you prefer a graphical workflow, use an audio converter such as fre:ac or another desktop converter that supports TTA output. Typical steps are:

1. Open the converter and add the .au file.
2. Choose TTA as the output format.
3. Adjust quality or compression settings if available.
4. Start the conversion and save the resulting .tta file.

Notes on quality, compatibility, or limitations

AU to TTA is a lossless conversion only if the AU source is uncompressed PCM audio. If the AU file uses a compressed encoding, the result may still be a valid TTA file, but it will preserve the decoded audio, not the original compression method. Also, because TTA support is limited in many players and devices, you may need a compatible audio player or convert the file again to a more widely supported format later.

Another important point is that TTA does not improve audio quality; it only stores the audio more efficiently without further loss. If your goal is broad compatibility, formats like WAV or FLAC are often easier to use than TTA.