M2TS to VOX Converter

Extract M2TS audio as Dialogic VOX ADPCM format online

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Blu-ray to Phone Audio

Extract voice content from M2TS Blu-ray video and encode it as VOX — ready for Dialogic IVR platforms and telephony systems.

Highly Compressed

VOX ADPCM keeps files tiny at 4 bits per sample. Transform large M2TS audio into space-efficient telephony prompts instantly.

Private Processing

M2TS uploads are deleted after conversion. VOX output files are removed within 24 hours — your audio content remains secure.

How to convert M2TS to VOX

1

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

2

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

3

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

About formats

M2TS (MPEG-2 Transport Stream) is a container format used primarily for multiplexing audio, video, and other data on Blu-ray Disc media. The format is specified as part of the Blu-ray Disc Audio-Video (BDAV) standard developed by the Blu-ray Disc Association, with commercial Blu-ray products launching in 2006. M2TS files wrap content in MPEG-2 transport stream packets with an additional 4-byte timestamp header prepended to each 188-byte packet, resulting in 192-byte packets that enable more precise timing and error recovery during optical disc playback. This extended packet structure helps maintain synchronization when dealing with the variable read speeds inherent to disc-based media. M2TS supports the major Blu-ray video codecs including H.264/AVC, MPEG-2, and VC-1, alongside audio formats such as Dolby TrueHD, DTS-HD Master Audio, and LPCM for lossless surround sound. The container is also used by AVCHD camcorders for recording high-definition footage, making it common in both consumer disc playback and video production workflows. M2TS files preserve chapter markers, subtitle streams, and interactive menu data within the transport stream. Reliable synchronization mechanisms and support for high-quality codecs make M2TS well-suited for archiving high-definition content where preserving full source quality is essential.
Initial release: 2006
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.
Initial release: 1983

Frequently Asked Questions

Why convert M2TS to VOX?

VOX is the standard format for Dialogic telephony and IVR systems. M2TS audio can be extracted and compressed for phone system deployment.

How compact is VOX audio?

VOX uses 4-bit ADPCM encoding for roughly 4:1 compression versus raw PCM. Very space-efficient for storing telephony voice prompts.

Does VOX have headers?

No — VOX is a headerless raw ADPCM stream. The receiving system must know the sample rate and encoding when loading VOX files.

Will M2TS HD audio survive?

VOX is a speech-grade format. M2TS high-definition audio is significantly compressed — suitable for voice, but music quality is reduced.

Can I process many M2TS files?

Batch upload multiple M2TS files and convert them all to VOX at once. Efficient for building telephony prompt libraries from video.