M4A is an audio file format that is very similar to MP4. It is a proprietary file format of Apple. iTunes store contains the audios as M4A format. It uses MPEG-4 codec to contain audio files. One of the basic differences between M4A and MP4 is M4A does not contain videos like MP4.



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aiff
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m4a
mp3
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wav
wma
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audio
aac
ac3
aif
aifc
aiff
amr
au
caf
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m4a
m4b
mp3
oga
voc
wav
weba
wma
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3g2
3gp
3gpp
avi
cavs
dv
dvr
flv
gif
m2ts
m4v
mkv
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mov
mp4
mpeg
mpg
mts
mxf
ogg
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swf
ts
vob
webm
wmv
wtv
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