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What is TTA?

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

What is AU?

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

When Should You Use TTA vs AU?

Use TTA When...

Go with TTA when lossless audio compression, archival is on your mind. Its lossless pipeline means what you put in is exactly what comes out.

Use AU When...

When legacy unix audio, sun workstation sound matters most, AU delivers. Its pristine output guarantees professional-grade results every single time.

TTA vs AU: Key Differences

  • •TTA uses lossless compression while AU uses lossless compression — both take the same approach to file size management.
  • •Neither format changes compression philosophy — both are lossless compression — so any size differences are due to encoding efficiency, not a shift in quality approach.
  • •How transparency is handled: AU supports transparency, so alpha information is preserved during conversion.
  • •File sizes: TTA files typically range 40-50% smaller than WAV and AU files Small to medium, similar to WAV.
  • •TTA is optimized for lossless audio compression, archival while AU is designed for legacy unix audio, sun workstation sound — choose based on your specific workflow needs

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.

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.

Common Use Cases for TTA to AU Conversion

  • Music production and mixing
  • Podcast distribution
  • Voice recordings
  • Streaming services
  • Audio books
  • Sound design

Industry Applications

Music ProductionPodcastingBroadcastingAudio EngineeringLanguage LearningAccessibility

Best Practices for TTA to AU Conversion

  • →For TTA to AU: 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
  • →AU 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 TTA and AU formats in our detailed guide.

Troubleshooting TTA to AU Conversion

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

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About TTA and AU

TTA

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

AU

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

Format Comparison

CompressionLossless → Lossless
TransparencySupported
Use CaseConvert from lossless audio compression, archival to legacy unix audio, sun workstation sound
File Size~Small to medium, similar to WAV after conversion

FAQs

Is converting TTA to AU free?

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

How long does it take to convert TTA to AU?

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

What is AU best used for?

AU is ideal for legacy unix audio, sun workstation sound. Sun AU, legacy Unix audio format for Sun workstations

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

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

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