Free online AIF to VOX converter

Source format: AIF

AIF usually refers to AIFF or AIFC, Apple’s Audio Interchange File Format. It is a uncompressed audio container commonly used for high-quality sound storage, especially in music production, audio editing, and archival workflows. AIFF files are widely supported by professional audio software on macOS and Windows, and they preserve audio quality well because they typically store PCM audio without lossy compression.

Target format: VOX

VOX is a compressed audio format most often associated with Dialogic ADPCM voice data. It is designed for speech and other low-bandwidth audio, so it uses much less storage than AIFF. VOX is mainly used in telephony, voice prompts, legacy voice systems, and some specialized audio applications. Its main advantage is small file size, but it is not suitable for high-fidelity music.

How to perform the conversion

The most reliable way to convert AIF to VOX is with a desktop audio tool such as Audacity or FFmpeg. Because VOX is a specialized format, not every editor can export it directly, so FFmpeg is often the best choice.

Using FFmpeg:

1. Install FFmpeg on your computer.
2. Open a terminal or command prompt.
3. Run a command like ffmpeg -i input.aif -ar 8000 -ac 1 -f vox output.vox.

This converts the source file to a mono, 8 kHz VOX file, which is a common setting for speech-oriented use. If your source is AIFF with a different extension such as .aiff, use that filename instead.

Using Audacity:

1. Open the AIF file in Audacity.
2. If needed, convert it to mono and set an appropriate sample rate such as 8000 Hz.
3. Choose File → Export → Export Audio.
4. If VOX is available in your Audacity build or via an appropriate export plugin, select it and save the file.

If your editor cannot export VOX directly, use FFmpeg after preparing the audio in Audacity. You can also convert the file on 101convert.com for free, without installing any software.

Quality, compatibility, and limitations

VOX is lossy and speech-focused, so converting from AIFF to VOX will reduce audio fidelity. This is normal and expected. For music, effects, or any content that needs full frequency range, VOX is a poor choice. It is best for voice recordings, prompts, and telephony audio.

For best compatibility, keep the output mono and use 8 kHz sample rate unless your target system requires something else. Some software labels VOX as Dialogic VOX or may not support it at all. Also, because VOX is a legacy format, playback support can be limited in modern media players.