3gp "for older phones that weren't capable of playing MP4" [1]
aac "lossy digital audio compression" [2]
flv Flash Video
m4a "lossy compression. M4A was generally intended as the successor to MP3" [3]
mp3 "MP3 is a coding format ... developed ... in Germany" [4]
mp4
ogg
wav
webm













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[1] https://blog.online-convert.com/3gp-vs-mp4-how-do-they-differ/
[2] https://en.wikipedia.org/wiki/Advanced_Audio_Coding
[3] https://whatis.techtarget.com/fileformat/M4A-Unprotected-AAC-audio-file
[4] https://en.wikipedia.org/wiki/MP3