Why is the file type of an m4a file always reads as aac?

[gdartillero]

Why is the file type of an m4a file reads as aac no matter what codec it contains? I have ac4+ims and eac3+joc files contained in an m4a container but in the properties tab, it's file type shows as aac. I have to create a custom tag (codec) for this to be useful in sorting. Is there a plugin or work around for musicbee to read the codec correctly?

[Mayibongwe]

This is not my area of expertise. Hoping this reply springs this topic back to light where somebody knowledgeable may advise.

[sveakul]

Why is the file type of an m4a file reads as aac no matter what codec it contains? I have ac4+ims and eac3+joc files contained in an m4a container but in the properties tab, it's file type shows as aac. I have to create a custom tag (codec) for this to be useful in sorting. Is there a plugin or work around for musicbee to read the codec correctly?

MusicBee is designed to assume the audio format based on the file extension, instead of by reading the file content  A while ago some reported it was not playing some of their mp3's and it turned out they were actually AAC files in a MP3 wrapper.  They were from some "free downloads" site.

But yes I agree it would be nice if it DID define by content (e.g. Foobar does this).