# M4A and Sonos (Sonos doesn't seem to recognize Album & Title)

**URL:** https://community.mp3tag.de/t/m4a-and-sonos-sonos-doesnt-seem-to-recognize-album-title/52450
**Category:** Support
**Created:** [March 20, 2021, 5:18pm UTC](https://community.mp3tag.de/t/m4a-and-sonos-sonos-doesnt-seem-to-recognize-album-title/52450 "2021-03-20T17:18:30Z")
**Posts on this page:** 1
**Showing post:** 4

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### Author: ![ohrenkino](https://community.mp3tag.de/user_avatar/community.mp3tag.de/ohrenkino/32/4843_2.png) [@ohrenkino](https://community.mp3tag.de/u/ohrenkino)
#### Post date: [March 20, 2021, 6:17pm UTC](https://community.mp3tag.de/t/m4a-and-sonos-sonos-doesnt-seem-to-recognize-album-title/52450/4 "2021-03-20T18:17:51Z")

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I found this thread:

> [@AAC and M4A formats?](https://community.mp3tag.de/t/aac-and-m4a-formats/12356):
>
> My car radio supports AAC format audio files, but they must have the file extension "m4a" (apparently iTunes AAC format). When I view files having "aac" extension with mp3tag I see that they have some tags, but if I rename the files to extension "m4a" mp3tag does not recognize the tags, and I get an error message if I try to save a tag to a file with "m4a" extension. Do files with "aac" and "m4a" extensions have different formats? Is there a reason why I cannot set a cover image in "aac" file…

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_[View the full topic](https://community.mp3tag.de/t/m4a-and-sonos-sonos-doesnt-seem-to-recognize-album-title/52450)._