Drop file here. 150 MB maximum file size.
Audio file encoded in the ADPCM (VoX) format dialogic & a format used to save audio from human speech; saves sampled digital voice data at low speed; reduces the size of audio data while maintaining clarity; used by computer telephony systems.
An SPH file is an audio file created in the NIST SPHERE format, which is often used in searching speech recognition. Usually contains the apos; recording of apos; a person who speaks. The SPH files can be provided as voice-recognition system entries.
Access powerful and secure free online VOX tools to convert, view, edit, merge, split, and compare VOX files β all without installing any software. Our tools support the .VOX (Dialogic Voice Audio File) file extension and run smoothly in any modern browser.
Select a tool below to explore features and manage your VOX files directly from your device with ease.
Chose or drag & drop your VOX file, click Convert to SPH, and download the SPH file. No registration needed.
Yes, all uploads are encrypted. Your files are auto-deleted after 24 hours.
Yes, our converter retains layout, fonts, and images as accurately as possible.
Fileproinfo converter engine works fast. You can convert VOX to SPH in a few seconds to couple of minutes for large size files with complex structure.
FileProInfo support manay file formats that allow you to convert VOX to 100s of file formats, without any limit, registration and downloading, 100% free and online VOX converter.
All converters in this list are manually verified & 100% free and working properly, however you must use these apps according to their respective terms & conditions.
This tool and page updated at: 12-Apr-2025
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