AIFF to AU Audio conversion is the process of transforming audio data stored in the Apple Interchange File Format (AIFF) into the Sun/NeXT AU audio file format. This conversion repackages PCM or compressed audio samples and metadata so the resulting .au file can be used by legacy audio systems and certain Unix-based applications while preserving playback fidelity when settings are matched.
Related guides
Practical guides to help you choose formats, preserve quality, and avoid common conversion problems.
FLAC and MP3 solve different audio problems. FLAC preserves every sample for archiving, editing, and serious listening, while MP3 creates compact files for phones, cars, streaming libraries, and quick sharing. This guide explains how FLAC to MP3 conversion works, which bitrate settings are most transparent, how to protect tags and album art, and when you should avoid converting at all.
Read guide →Learn how to convert WAV to MP3 with optimal quality settings. This guide covers bitrate selection, CBR vs VBR encoding, step-by-step conversion methods using online tools, Audacity, and FFmpeg, plus expert advice on preserving audio fidelity during compression.
Read guide →A comprehensive comparison of MP3, FLAC, AAC, WAV, and OGG audio formats. Learn which codec delivers the best quality, compatibility, and file size for music, podcasts, and archiving.
Read guide →Drag your .AIFF file from your computer or use the browse function.
Confirm .au as the selected destination format.
Click "Convert" and download your converted .AU file once ready.
The AIFF format uses the MIME type audio/aiff and typically stores uncompressed PCM audio, making it ideal for professional sound editing. AU Audio files use the MIME type audio/basic and often contain u-law or PCM codecs, commonly utilized in Unix and Sun Microsystems systems for sound data. Both formats support high-fidelity audio but serve different platform needs.
The AU Audio (.AU) format is commonly used for audio. Understanding its characteristics can be helpful when converting to or from other formats like AIFF.
While specific technical details aren't available here, AU Audio files generally serve the purpose of storing audio effectively within their domain.
Our Online AIFF to AU Converter offers a seamless way to convert your AIFF audio files into the AU Audio format directly from your browser. Designed for quality and speed, this tool supports hassle-free conversions without any software installation, making it ideal for audio professionals and enthusiasts alike.
AIFF is a high-quality uncompressed audio format commonly used on Apple devices, offering excellent fidelity. In contrast, AU Audio is a simpler format often found in Unix environments, focusing on compatibility and smaller file size. While AIFF prioritizes audio quality, AU Audio provides broader system support in certain professional contexts.
Keep original bit depth and sample rate if you need lossless quality; avoid unnecessary downsampling or re-quantization.
For archival or editing use, convert AIFF PCM to AU PCM with the same bit-depth (e.g., 16-bit 44.1kHz) to preserve fidelity.
When converting many files, use batch mode or a command-line tool to maintain consistent settings and save time; verify a sample file first.
Watch file sizes: uncompressed AU PCM files can be large—expect roughly 10 MB per minute for 16-bit stereo at 44.1 kHz; consider compressed AU variants (µ-law) for voice-only audio.
The AIFF to AU converter is incredibly fast and keeps my audio crystal clear.
Emily R.
Musician
Perfect for preparing files for legacy Unix systems without losing quality.
Jack M.
Audio Engineer
Easy to use and reliable, it saved me hours converting formats.
Lisa K.
Producer
Start your free AIFF to AU conversion now.
Drag your file here to to upload.
Up to 250MB
Format limitation: AU headers have less flexible metadata support than AIFF and some compressed AIFF-C codecs may not map directly to AU without re-encoding.