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VOX files are a type of audio file commonly used for storing voice recordings and sound data. They are favored in telephony and voice processing applications due to their efficient compression and relatively small file size. The VOX format typically uses Dialogic ADPCM compression, which balances audio quality with file size. Interestingly, VOX files were widely adopted in early voicemail and IVR systems.
The VOX file format typically uses Dialogic ADPCM encoding, which compresses audio data by approximating sound waves with fewer bits than standard PCM. This results in files that are significantly smaller than uncompressed audio while maintaining intelligible voice quality. VOX files usually have a sample rate of 6kHz to 16kHz, optimized for voice frequencies rather than full-spectrum audio. The format does not support metadata or multi-channel audio, reflecting its specialized use case for voice data.
VOX files are often used in environments where storage space is limited, such as in call centers or embedded systems. These files can be played back on various media players that support ADPCM audio, but they are not as widely compatible as more common formats like WAV or MP3. Converting VOX files to more popular formats can make them easier to use across different devices. The format's efficiency made it popular in the 1990s when digital storage was costly.
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