Convert mv4 to voc

What is the difference between .mv4 and .voc?

Description: M4V is a video container that stores audio and video data used for iTunes files. Files of this type may be protected from illegal viewing and copying with Apple FairPlay DRM. In this case audio or video files should be bought in iTunes store. Not protected files can be viewed almost in any modern player because the format is based on MPEG-4 structure.; The VOC file format is an audio file format primarily used by Creative Technology's Sound Blaster sound cards for storing digital audio data. Developed by Creative Labs, the VOC format was widely used for storing sound samples and music files on PCs during the late 1980s and early 1990s. VOC files support mono and stereo sounds at various sampling rates and can contain multiple sound snippets and silence segments, making them versatile for a range of audio applications, including video games, sound effects, and voice.