OGG to AU Converter
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Supports: OGG
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Need help?How to Convert OGG to AU
- Upload Your OGG File — Click "Choose Files" or drag and drop your OGG (Ogg Vorbis) audio file. Only .ogg files are accepted.
- Set Audio Channel — Under Audio Channel, choose Original, Mono, or Stereo. AU files are commonly mono for system sounds.
- Set Sample Rate — Under Audio Sample Rate, choose from 8000 Hz through 48000 Hz. Common AU sample rates are 8000 Hz (telephony) and 44100 Hz (CD quality).
- Trim (Optional) — Under Trim, set a Start Time and Duration in seconds or HH:MM:SS.sss format.
- Convert & Download — Click "Convert" and download your AU file.
Why Convert OGG to AU?
AU (Audio file format) was developed by Sun Microsystems for Unix and NeXTSTEP systems. It stores uncompressed PCM audio data and is still used in Unix/Linux system sounds, Java audio APIs (javax.sound), scientific and research applications, and legacy Solaris and macOS audio workflows. OGG uses lossy Vorbis compression, while AU stores raw uncompressed audio — converting from OGG to AU is useful when your application requires uncompressed PCM input.
OGG vs AU Comparison
| Feature | OGG (Vorbis) | AU (Sun Audio) |
|---|---|---|
| Compression | Lossy (Vorbis) | Uncompressed (PCM) |
| File size (1 min, stereo) | ~1 MB at 128 kbps | ~10 MB at 44100 Hz |
| Audio quality | Good (lossy) | Perfect (lossless PCM) |
| Platform | Cross-platform | Unix/Linux, Java |
| Use case | Music, streaming, games | System sounds, scientific audio |
| Browser support | Chrome, Firefox | Not supported |
Common AU Sample Rates
| Sample Rate | Quality | Use Case |
|---|---|---|
| 8000 Hz | Telephone | VoIP, system alerts, telephony |
| 22050 Hz | AM radio | Simple sound effects |
| 44100 Hz | CD quality | Music, high-quality audio |
| 48000 Hz | Broadcast | Professional audio, video sync |
Why is the File Compression section not available?
AU is an uncompressed PCM format — there are no compression options because the audio data is stored raw without any lossy or lossless encoding. The output file will be significantly larger than the OGG source. Use Audio Channel (Mono) and a lower Sample Rate to reduce file size.
Will the AU file be much larger than the OGG?
Yes. AU stores uncompressed PCM data, so a 1 MB OGG file at 128 kbps becomes roughly 10 MB as AU at 44100 Hz stereo. To minimize size, convert to Mono and use a lower sample rate (8000 Hz for voice, 22050 Hz for simple audio).
What applications use AU files?
AU is used in Java audio APIs (javax.sound.sampled), Unix/Linux system sounds, Audacity (as an import/export format), MATLAB and scientific computing, and legacy Sun Solaris and NeXTSTEP applications.
Can I trim the audio during conversion?
Yes. Under Trim, switch to "Trim" and enter a Start Time and Duration. This extracts a specific segment, which also helps reduce the output file size since AU files are uncompressed.
Does AU support stereo audio?
Yes. AU supports both mono and stereo. Under Audio Channel, choose Stereo to preserve both channels or Mono to halve the file size.