MXF to VOX Converter

Extract Dialogic VOX audio from MXF video files

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IVR Standard

VOX is the telephony industry standard. Extract MXF audio for IVR prompts and automated phone systems.

Compact Speech

Dialogic ADPCM compresses MXF audio at 4:1 ratio — small files for telephony deployment.

Cloud Extraction

VOX encoding from MXF runs on our servers — no Dialogic hardware or SDK needed.

How to convert MXF 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

MXF (Material Exchange Format) is a professional media container standardized by the Society of Motion Picture and Television Engineers (SMPTE) in 2004 under the SMPTE 377M specification. Designed for the broadcast and post-production industries, MXF provides a vendor-neutral wrapper for carrying video, audio, and rich descriptive metadata between different production systems and platforms. The format supports a wide range of professional codecs including MPEG-2, AVC-Intra, DNxHD, DNxHR, ProRes, and JPEG 2000, making it adaptable to various quality tiers from proxy editing to master-quality archive. An extensive metadata framework is one of the defining characteristics of MXF, carrying production information such as timecodes, clip names, descriptive markers, source references, and technical parameters within a structured Key-Length-Value (KLV) encoding scheme. This metadata travels with the content through the production chain, reducing the risk of information loss when files move between ingest, editing, graphics, playout, and archive systems. MXF files use an operational pattern system that defines different levels of complexity, from simple single-item packages (OP1a) to complex multi-item playlists. Major broadcast equipment manufacturers and file-based workflow systems universally support MXF, and it serves as the interchange format for standards like AS-02 and AS-11 used in broadcasting.
Initial release: 2004
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 MXF to VOX?

VOX uses Dialogic ADPCM encoding for IVR and telephony systems — extract MXF audio for automated phone response platforms.

What uses VOX files?

IVR systems, Dialogic telephony cards, and call center automation platforms accept VOX as their native audio format.

How does VOX compress?

VOX uses OKI ADPCM at 4:1 compression — small files optimized for telephony-grade speech quality.

Is VOX good for music?

No — VOX is designed for speech in telephony applications. Music loses significant quality due to the narrow encoding.

Can I batch process?

Upload multiple MXF files and extract VOX audio from each simultaneously for IVR prompt creation.