M4V to VOX Converter
Extract M4V audio as Dialogic VOX ADPCM format online
Apple Video to Telephony
Extract voice from M4V video and encode as VOX ADPCM — the standard for Dialogic-based IVR systems and telephone voice prompts.
Space-Efficient
VOX ADPCM keeps telephony audio files tiny. Convert M4V audio into compact prompts that minimize storage on your phone system.
Any Device Works
Run the M4V to VOX conversion from any computer or mobile device with a browser. No Dialogic tools or Apple software required.
How to convert M4V 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
Frequently Asked Questions
VOX is the Dialogic ADPCM standard for IVR and telephony. Converting M4V audio creates phone prompts and announcements from Apple video.
VOX stores 12-bit audio in 4-bit ADPCM, achieving roughly 4:1 compression. Very efficient for telephony prompt storage and delivery.
Yes — VOX has no file header. The telephony system must know the sample rate (typically 8kHz) when loading and playing VOX files.
VOX is speech-oriented. Music from M4V sounds degraded — this format excels at clear voice reproduction for phone system use.
DRM-protected iTunes M4V files cannot be processed. Unprotected M4V videos convert to VOX without any restrictions.