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VOC is an audio file format developed by Creative Labs for storing sound data on Sound Blaster sound cards. VOC files can contain voice recordings, sound effects, and music. While it was popular in the early days of computer sound, it is now largely obsolete, with MP3 and WAV taking over as more common formats.
M4A is an audio file format developed by Apple, often used for songs and other audio content in iTunes. It is based on the AAC codec and offers high compression with minimal loss of quality. M4A is ideal for digital music files due to its smaller size and efficient storage.