How do I convert AU files to W64?

Upload your .au file by dragging it into the converter or clicking 'Choose File'. Select W64 from the output format list. Optionally adjust sample rate, bit depth, or channel mapping. Click 'Convert' — the file is processed locally in your browser. Once complete, click 'Download' to save your .w64 file. You can also batch-convert multiple AU files at once.

Why convert from AU to W64 instead of keeping AU?

AU is an older Sun Microsystems format with limited OS support, while W64 (Sony Wave64) is designed for modern audio production and supports files over 4GB without splitting. W64 is natively compatible with professional tools like Sound Forge, Pro Tools, and Adobe Audition. Converting AU to W64 ensures your audio is future-proof, editable, and free from the 4GB WAV/RIFF size limitation.

How does the conversion preserve audio quality and metadata from AU to W64?

For PCM-based AU files, the conversion is bit-perfect: it retains the original bit depth (16/24/32-bit), sample rate (up to 192kHz), and channel layout (mono, stereo, 5.1). Metadata like artist, title, and loop markers are mapped from AU's annotation field to W64's INFO/LIST chunk. If your AU uses a compressed codec (μ-law or A-law), we decode it to unpacked PCM and store it in W64, ensuring lossless quality relative to the source. No resampling or dithering is applied unless you explicitly enable it.

Is AU-TO-W64 free to use?

Yes, AU-TO-W64 on LetsConvert is 100% free with no registration or hidden fees required.

Are my uploaded files safe and secure?

Yes! File privacy and security are guaranteed. Basic conversions run locally in your browser. Files sent for server processing are automatically deleted within 1 hour.

Does this converter work on mobile phones and tablets?

Yes! AU-TO-W64 works seamlessly across iPhone, Android, iPad, Mac, Windows, and Linux browsers without installing any app.

Is there any software installation required?

No software or browser extension installation is needed. All conversions are performed directly online.

AU➔W64· 100% Free & 320kbps

AU-TO-W64

Need to convert AU to W64? Our tool preserves exact audio bitrate, PCM and metadata for professional DAW compatibility, even beyond the 4GB WAV limit.

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4.7 / 5.0(36 user ratings)

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Choose Au audio file or drag & drop here

Supports up to 50MB · Studio quality sound

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AU

AU File Format

Source Format

AU is a standardized digital file format supported by LetsConvert. Convert AU files securely, privately, and instantly online with zero software installation, bank-grade encryption, and automatic 60-minute file purging.

Category: Data & Media File

MIME Type: application/au

Developer: Standard Organization

Best For: Converting and managing AU files across devices and applications.

✨

W64

W64 File Format

Target Output

W64 is a standardized digital file format supported by LetsConvert. Convert W64 files securely, privately, and instantly online with zero software installation, bank-grade encryption, and automatic 60-minute file purging.

Category: Data & Media File

MIME Type: application/w64

Developer: Standard Organization

Best For: Converting and managing W64 files across devices and applications.

💡 Technical Guide & Conversion Insights

Why Convert AU to W64?

Converting from AU (AU File Format) to W64 (W64 File Format) is essential when you need enhanced compatibility, reduced file size, or specific feature support. While AU is ideal for Converting and managing AU files across devices and applications., W64 offers superior advantages for Converting and managing W64 files across devices and applications.. Our secure online conversion engine ensures that all your AU file attributes, geometry, quality, and metadata are seamlessly preserved during the transformation into W64.

● AU Key Advantages:

✓Standard format compatibility
✓Fast online conversion processing
✓Zero software install required

● W64 Key Advantages:

★Standard format compatibility
★Fast online conversion processing
★Zero software install required

AU vs W64 Comparison Table

Detailed technical differences and capabilities between AU File Format and W64 File Format.

Feature / Attribute	AU	W64
Primary Format Name	AU File Format	W64 File Format
Primary File Category	Data & Media File	Data & Media File
Standard MIME Type	application/au	application/w64
Core Developer / Standard	Standard Organization	Standard Organization
Optimal Use Case	Converting and managing AU files across devices and applications.	Converting and managing W64 files across devices and applications.

❓ Common Questions

Frequently Asked Questions (AU to W64)

Everything you need to know about converting AU to W64 with LetsConvert.

To convert your AU file to W64, upload your file by dragging and dropping it into the upload box or selecting it from your device. Adjust any optional quality or dimension settings, then click 'Convert'. Your converted W64 file will be ready for instant high-speed download within seconds.

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100% Secure & Automatic File Purging

Your AU files are encrypted with 256-bit SSL and permanently deleted from our servers within 60 minutes.

● Zero File Storage

How to Convert AU-TO-W64

Select or drop your Au file.

Initiate the W64 conversion process.

Download your converted W64 file.

⚡ Related Audio Tools

AU-TO-W64

AU

W64

Why Convert AU to W64?

● AU Key Advantages:

● W64 Key Advantages:

AU vs W64 Comparison Table

Frequently Asked Questions (AU to W64)

100% Secure & Automatic File Purging

How to Convert AU-TO-W64

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