VOX to AU Audio conversion is the process of transforming audio recorded or stored in the VOX format (a Dialogic ADPCM compressed voice format commonly used in telephony) into the AU audio file format (a simple, uncompressed or lightly encoded audio container originating from Sun/Unix systems). This conversion decodes the ADPCM-compressed VOX data and re-encodes or wraps it into AU with user-selected sample rate and encoding options to ensure compatibility with legacy Unix players and modern audio tools.
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Read guide →Drag your .VOX file from your computer or use the browse function.
Confirm .au as the selected destination format.
Click "Convert" and download your converted .AU file once ready.
VOX files generally use the Dialogic ADPCM codec with a MIME type of audio/vox and are common in telephony. AU files usually employ u-law, PCM, or other codecs with a MIME type of audio/basic, mainly used on Sun and Unix systems for audio storage and playback. Both formats serve different use cases, with AU favored for broader compatibility.
The AU Audio (.AU) format is commonly used for audio. Understanding its characteristics can be helpful when converting to or from other formats like VOX.
While specific technical details aren't available here, AU Audio files generally serve the purpose of storing audio effectively within their domain.
Our Online VOX to AU Converter allows you to transform your VOX audio files into the AU format quickly and without hassle. Designed for users who need a reliable and efficient solution, this converter supports high-quality output suitable for various audio applications.
VOX files are typically compressed and used mainly for telephony audio recordings, often with limited compatibility outside specific applications. AU Audio files offer uncompressed or lightly compressed formats widely supported on Unix and multimedia platforms, providing better versatility and editing options.
Keep individual VOX files under 250MB for free online converters to ensure smooth uploads and processing; split very long recordings into segments.
Preserve quality by choosing an AU output sample rate equal to or higher than the VOX source (e.g., convert 8 kHz VOX to 8 kHz AU) and prefer 16-bit PCM if you need higher fidelity.
For batch conversions, use a tool or service that supports folder uploads or a command-line utility (ffmpeg) to automate conversion and maintain consistent naming.
Note format limitations: VOX typically stores mono, low-sample-rate ADPCM—expect limited high-frequency detail; converting to higher sample rates cannot recover lost information.
This VOX to AU converter saved me hours of manual work.
James M.
Audio Engineer
Reliable and easy to use, perfect for quick conversions.
Anna L.
Podcast Producer
The audio quality after conversion is impressive and consistent.
Michael S.
Software Developer
Start your free VOX to AU conversion now.
Drag your file here to to upload.
Up to 250MB
If you need telephony compatibility, export AU as mu-law or A-law to match standard PSTN/VoIP requirements.