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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.
WMA is a digital audio format developed by Microsoft, primarily used for music and audio streaming. It offers high compression while maintaining good sound quality. WMA files are supported by Windows-based devices and media players, but are less compatible with other operating systems compared to MP3.