Audio Mode is designed for audio/music files. It can match songs by their tags, or their audio data.
Supported file types are:
.mp3
.ogg
.wav
.wma
.ape
.flac
.m4a
.m4p
All other files types in the scan are ignored.
Match Audio Tags option
This special mode will read the extra information contained within the file - Song title, Artist, Length, Bit Rate, etc.
The currently supported formats are MP3, M4A, M4P, WMA,OGG,APE and FLAC. This information can then be used as an additional tool when deciding which files to delete.