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What is AU?

Sun AU is the native audio format for Sun Microsystems workstations, using simple mu-law encoding or uncompressed PCM.

What is TTA?

True Audio (TTA) is a free, real-time lossless audio codec that provides efficient compression without compromising audio quality.

When Should You Use AU vs TTA?

Use AU When...

Go with AU when legacy unix audio, sun workstation sound is on your mind. Its lossless pipeline means what you put in is exactly what comes out.

Use TTA When...

When lossless audio compression, archival matters most, TTA delivers. Its pristine output guarantees professional-grade results every single time.

AU vs TTA: Key Differences

  • •The core technical difference: AU relies on lossless compression whereas TTA uses lossless compression.
  • •Both formats share lossless compression, so quality behavior is similar across the two — file size differences come from algorithm efficiency rather than compression philosophy.
  • •Alpha channel support: TTA lacks transparency support.
  • •Storage footprint: Small to medium, similar to WAV for AU vs 40-50% smaller than WAV for TTA.
  • •AU is optimized for legacy unix audio, sun workstation sound while TTA is designed for lossless audio compression, archival — choose based on your specific workflow needs

Advantages of AU

  • ✓AU uses lossless compression tailored for Legacy Unix audio, Sun workstation sound.
  • ✓AU is supported natively on virtually every device, browser, and operating system.
  • ✓AU files are bit-for-bit perfect, preserving every pixel and sample for professional work.
  • ✓AU integrates seamlessly with all major creative tools and workflows.

Advantages of TTA

  • ✓TTA compresses data using lossless methods, keeping file sizes manageable for Lossless audio compression, archival.
  • ✓Industry-wide support means TTA files open anywhere — from legacy systems to the latest devices.
  • ✓Lossless quality makes TTA the gold standard for archival and master copies.
  • ✓From professional software to open-source alternatives, TTA works out of the box.

Common Use Cases for AU to TTA Conversion

  • Video game audio assets
  • Film soundtracks
  • Radio commercials
  • Guided meditation recordings
  • Audiovisual installation
  • Music education

Industry Applications

Game AudioFilm Post-productionAudiobook PublishingMusic StreamingLive SoundForensic Audio

Best Practices for AU to TTA Conversion

  • →For AU to TTA: match the sample rate and bit depth to your delivery platform — 44.1 kHz / 16-bit is the standard for music
  • →Apply loudness normalization (LUFS) before conversion to ensure consistent volume across your audio library
  • →TTA prioritizes quality — ensure your storage can accommodate the resulting file sizes
  • →Check that metadata tags (artist, album, track number) survive the conversion
  • →Convert a short segment first to verify quality at your chosen bitrate
  • →Keep a lossless master copy in case you need to re-encode for a different platform

Related Article

Video Compression Guide: Reduce File Size Without Losing Quality

Learn more about AU and TTA formats in our detailed guide.

Troubleshooting AU to TTA Conversion

  • !TTA audio quality degraded vs AU → use a higher bitrate (at least 256 kbps for music)
  • !TTA file won't play on your device → check format compatibility with your player or platform
  • !Metadata (artist, album, title) lost after AU to TTA conversion → some formats like TTA may not support ID3 tags
  • !Volume changed after converting AU to TTA → normalize audio levels before conversion for consistent playback

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Convert AU to TTA Online - Free & Fast

Convert AU files to TTA online for free. High-quality conversion with no registration required.

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About AU and TTA

AU

AU (AU audio) - Sun AU, legacy Unix audio format for Sun workstations. Best for legacy unix audio, sun workstation sound.

TTA

TTA (True Audio TTA) - True Audio, real-time lossless audio codec. Ideal for lossless audio compression, archival.

Format Comparison

CompressionLossless → Lossless
TransparencySupported
Use CaseConvert from legacy unix audio, sun workstation sound to lossless audio compression, archival
File Size~40-50% smaller than WAV after conversion

FAQs

Is converting AU to TTA free?

Yes, GoConvertFile offers free conversion of AU to TTA for files up to 100MB. No registration required.

How long does it take to convert AU to TTA?

Most AU to TTA conversions complete within seconds for standard-sized files. Larger files may take longer depending on the conversion complexity.

What is TTA best used for?

TTA is ideal for lossless audio compression, archival. True Audio, real-time lossless audio codec

What file size should I expect after converting AU to TTA?

File size after AU to TTA conversion depends on the content complexity and quality settings. Both formats use similar compression approaches so sizes are comparable.

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