Convert AUD to MP3

Older Westwood game sound files often need conversion because modern players and editors generally do not open the proprietary AUD format. Converting the extracted audio to MP3 makes it easier to play on phones, share, or use in current editing software.

What the AUD format is

In the Audio category, AUD most commonly means the proprietary compressed audio format used by Westwood Studios games, including Command & Conquer, Red Alert, and Dune 2000. Game archives use AUD files for music, speech, and sound effects. The extension is not a universal audio standard, so an AUD file created by another application may require that application's own decoder.

A Westwood AUD file is not an Audacity project. Audacity projects normally use .aup or .aup3; Audacity generally cannot open Westwood AUD files directly.

What the MP3 format is

MP3 is a widely supported lossy audio format used by phones, media players, websites, and most editing applications. It creates much smaller files than uncompressed WAV by discarding audio information. The chosen bitrate or variable-bitrate setting controls the compromise between file size and sound quality.

How to convert AUD to MP3

1. Install XCC Mixer from the XCC Utilities package on Windows. It is designed to inspect Westwood game archives and decode their audio assets.
2. Open the relevant game archive, commonly a .mix file, or open the standalone .aud file if the utility supports it. Select the audio asset.
3. Use XCC Mixer's export or save-as-WAV function to decode the AUD file to input.wav. If the AUD file is inside an archive, extract it first when direct export is unavailable.
4. Convert the WAV file with a desktop encoder. In Audacity, import input.wav, then choose File → Export Audio, select MP3, choose the bitrate mode, and save the file.

For command-line conversion, FFmpeg can encode the decoded WAV even though standard FFmpeg builds generally do not decode Westwood AUD:

ffmpeg -i input.wav -c:a libmp3lame -q:a 2 output.mp3

-q:a 2 requests high-quality variable-bitrate encoding, commonly around 190 kbps. Use -b:a 128k for smaller files or -b:a 320k for a fixed high bitrate:

ffmpeg -i input.wav -c:a libmp3lame -b:a 128k output.mp3

For an online conversion attempt, use a service such as Zamzar only when its current format list explicitly identifies the upload as Westwood AUD. Many general converters accept the .aud extension but cannot decode this game-specific format; do not upload the file merely because a site advertises generic audio conversion. Local conversion avoids upload limits, privacy concerns, and possible rejection of copyrighted game assets.

Quality and compatibility limits

Westwood AUD assets may already have low sample rates, mono output, narrow frequency ranges, or lossy compression. Exporting to WAV decodes the audio into a broadly compatible PCM file but cannot restore detail removed during the original compression. Encoding that WAV as MP3 adds another lossy stage.

Keep the decoded WAV as the archival or editing copy and create MP3 only for playback or sharing. Retain the source sample rate and channel count unless the target editor or device requires resampling. If XCC Mixer cannot identify the file, verify which game or application created it; renaming the extension does not change its codec.