3G2 to VOX Converter

Capture VOX audio from 3G2 media clips in the browser

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No Installation

The converter runs entirely in your web browser. No plugins, no apps, no downloads — just open convertio.tools and start converting immediately.

Cloud-Powered

All processing runs on our servers — your device handles nothing. Upload, convert, and download without draining local resources or battery life.

Soundtrack Capture

Grab the audio layer from 3G2 recordings and store it as VOX. Perfect for isolating music, dialogue, or ambient sound from video footage.

How to convert 3G2 to VOX

Select files from Computer, Google Drive, Dropbox, URL or by dragging it on the page.

Choose vox or any other format you need as a result (more than 200 formats supported)

Let the file convert and you can download your vox file right afterwards

About formats

3G2 (3GPP2 file format) is a multimedia container developed by the 3rd Generation Partnership Project 2 for use on CDMA2000 mobile networks. Built on the ISO base media file format (MPEG-4 Part 12), it stores video encoded with H.263 or MPEG-4 Visual alongside audio in AMR, EVRC, or AAC codecs. The specification was first published in December 2003 to provide a standardized way for CDMA-based phones and networks to handle multimedia messaging and video playback. 3G2 files are engineered for extremely low-bandwidth conditions, achieving playable video quality at bit rates as low as 30-60 kbps. This makes the format especially efficient for mobile video capture on devices with limited processing power and storage. The container supports multiple tracks, timed text for subtitles, and embedded metadata. One significant benefit is near-universal compatibility with CDMA handsets from the mid-2000s era, ensuring reliable playback across a wide range of mobile devices. Though newer formats like MP4 have superseded 3G2 for most purposes, it remains useful for working with legacy mobile content and for situations where minimal file size is the primary concern.

Developer: 3rd Generation Partnership Project 2

Initial release: December 2003

VOX is a headerless audio format built around Dialogic ADPCM encoding, widely adopted in telephony, interactive voice response (IVR) systems, and voice mail platforms since the 1980s. Each audio sample is compressed into 4 bits using an algorithm developed by Oki Electric and implemented in hardware on Dialogic Corporation's telephony interface cards. VOX files typically use a sampling rate of 6000 or 8000 Hz, producing extremely compact recordings optimized for speech intelligibility rather than musical fidelity. Because the format carries no header, playback software must know the sample rate and encoding parameters in advance — a trade-off that reduces overhead but demands careful file management. The primary advantage of VOX is storage efficiency: a one-minute voice recording at 8 kHz occupies roughly 240 KB, making it practical for systems storing thousands of prompts. Dialogic ADPCM conforms to the ITU-T G.726 standard, ensuring interoperability across telephony equipment from different vendors. Even as modern call centers migrate to IP-based systems with codecs like Opus, vast libraries of VOX recordings persist in legacy IVR deployments and compliance archives worldwide.

Developer: Dialogic Corporation

Initial release: 1983

Frequently Asked Questions

Why convert 3G2 to VOX?

VOX targets a particular set of hardware or software systems. Extracting VOX from 3G2 ensures your audio is ready for those specialized environments.

How can I open VOX files?

VOX opens in telephony systems, IVR platforms, and SoX for desktop playback.

Can I batch convert multiple 3G2 files?

Yes — upload several 3G2 files at once and convert them all to VOX in a single session. Each file processes in parallel on our cloud infrastructure.

How long does 3G2 to VOX conversion take?

Conversion speed varies by file length and bitrate. Short 3G2 clips become VOX files in seconds, while longer recordings may take a few minutes.

Does converting 3G2 to VOX lose quality?

Some quality loss is normal with lossy compression, but at adequate settings the difference from the original 3G2 audio is barely noticeable.

Do I need to install anything?

The converter is completely web-based. No software, no plugins — just open convertio.tools in any modern browser and convert 3G2 to VOX directly.

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Specific converters

WAV to VOX

MP3 to VOX

M4A to VOX

MP4 to VOX

OGG to VOX

VOC to VOX

3GP to VOX

AAC to VOX

WMA to VOX

MPEG to VOX

AMR to VOX

OPUS to VOX

ASF to VOX

MOV to VOX

MP2 to VOX

FLAC to VOX

FLV to VOX

AU to VOX

IRCAM to VOX

GSM to VOX

WMV to VOX

3G2 to VOX

AAF to VOX

AV1 to VOX

AVCHD to VOX

AVI to VOX

CAVS to VOX

DIVX to VOX

DV to VOX

F4V to VOX