Online AAC to AU Audio Converter

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What is an AAC File?

AAC, short for Advanced Audio Coding, is a digital audio encoding format designed to provide higher efficiency and better sound quality than MP3 at similar bitrates. It is widely used for both streaming and storing audio content.

Key Advantages of AAC Files:

Improved Compression: AAC achieves better compression efficiency than MP3, delivering higher sound quality at lower bitrates.

Enhanced Sound Quality: AAC preserves more audio detail and nuances compared to MP3, making it suitable for high-quality audio playback.

Wide Compatibility: Supported by most modern audio players, devices, and streaming services, ensuring broad accessibility.

Limitations of AAC Files:

Licensing: AAC is a proprietary format, and its licensing may incur costs or restrictions for use in certain applications.

Lossy Compression: Like MP3, AAC involves discarding some audio data during compression, which may result in perceptible quality loss compared to lossless formats.


AAC is preferred for its balance of high efficiency, improved sound quality, and broad compatibility, making it ideal for digital audio distribution and playback in various environments.

How to Convert AAC to AU?

Step 1: Load Your Audio

Upload your AAC audio file by dragging it into the upload area or selecting it from your device using the 'Browse' button.

Step 2: Adjust Output Preferences

Customize the settings for your AU audio. Select the bitrate, sample rate, and other options as needed.

Step 3: Begin Audio Conversion

Press the 'Convert' button to start the conversion of your AAC audio to AU format.

Step 4: Download the Audio File

When the conversion is done, click the 'Download' button to download your AU audio file to your device.

Step 5: Convert Again

To convert another AAC file to AU, click on the 'Convert Another' button and repeat the process.

AAC to AU Conversion FAQs

1. How do I convert AAC files to AU?

Our tool allows you to easily convert AAC files to AU. Just upload your AAC file, and the conversion process will start automatically, resulting in a AU file.

2. Where do I upload AAC files for converting to AU?

To upload, drag your AAC files or click 'Browse' to select. The upload area is easy to use, and you can quickly add your AAC files for conversion to AU.

3. What should I do to download the AU file?

Use the Download link to obtain your AU file after conversion. The download process is easy, and you can access your AU file immediately after the conversion is complete.

4. Can I convert multiple AAC files to AU in one session?

There is no restriction on converting multiple AAC files to AU. You can upload and convert several AAC files to AU in a single session, making the process efficient.

5. Is there an option to convert additional AAC files?

Initiate a new conversion process by selecting 'Convert Another' or uploading. This feature allows you to begin another AAC to AU conversion right away.

6. How secure is the AAC to AU conversion process?

We protect your files by using a secure, client-side conversion process. Your AAC files are handled locally, ensuring that they are not exposed to any external threats.

7. How is the quality maintained in converted AU files?

The conversion process ensures high-quality output for all AU files. Our tool is designed to maintain the integrity and quality of your AAC files when converting to AU.

8. Can I convert large AAC files to AU?

There is a 25MB size limit for AAC files. This limit helps maintain the efficiency of the conversion process, ensuring you get your AU file without any delays.

9. What is the average time for converting AAC to AU?

File size and internet speed affect conversion time, but it's typically fast. Our tool is designed to provide quick conversions, ensuring you get your AU file without any delays.

10. How do I get help with AAC to AU conversion difficulties?

Visit the 'Contact Us' page to get help from our support team. We are available to assist you with any issues or questions about the AAC to AU conversion process.