WMA is an audio format created by compressing and losing a piece of data. WMA stands for Windows Media Audio developed by Microsoft, which is considered a competitor of MP3. WMA files have even less capacity than MP3 (maybe only half) but the quality is not inferior.

Format Description
aac Advanced Audio Coding
mp3 MPEG-1 Audio Layer 3
m4a MPEG-4 Audio Book
wav Waveform audio format
ogg Ogg Vorbis Compressed Audio File
weba WebA Audio File
wma Windows Media Audio
flac Free Lossless Audio Codec
m4b MPEG-4 Audio Book
ac3 Audio Coding 3