# Artist and cover not recognized on my smartphone with aac files
**URL:** https://community.mp3tag.de/t/artist-and-cover-not-recognized-on-my-smartphone-with-aac-files/47549
**Category:** Support
**Created:** [January 17, 2020, 5:58am UTC](https://community.mp3tag.de/t/artist-and-cover-not-recognized-on-my-smartphone-with-aac-files/47549 "2020-01-17T05:58:51Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@sir\_leinad](https://community.mp3tag.de/u/sir_leinad)
#### Post date: [January 17, 2020, 5:58am UTC](https://community.mp3tag.de/t/artist-and-cover-not-recognized-on-my-smartphone-with-aac-files/47549/1 "2020-01-17T05:58:51Z")
change the mp3 format by acc of my music collection, edit the tags and put covers but in the player of my smartphone I can not see the covers and in the artist field I see "(unknown)". mp3tag can work with aac files or I must return to the mp3 format? . I want to optimize the size of my music collection because it is more than 80 GB. It is important for me that my collection is organized and available on my smartphone
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### Author:  [@ohrenkino](https://community.mp3tag.de/u/ohrenkino)
#### Post date: [January 17, 2020, 7:03am UTC](https://community.mp3tag.de/t/artist-and-cover-not-recognized-on-my-smartphone-with-aac-files/47549/2 "2020-01-17T07:03:01Z")
see e.g. this thread:
> [@Unable to edit/embed cover art in aac files](https://community.mp3tag.de/t/unable-to-edit-embed-cover-art-in-aac-files/8635):
>
> Hi All, I'm having the following problem, I'm reripping all my audio cd's to aac (HE-AAC 48kbps parametric stereo) because I'm switching from iPod to Nokia N78. I want to embed the cover art in the file as opposed to having the picture files separately (otherwise the pictures show up in my Nokia in between my own pictures). I'm using winamp to rip and trying to embed art with mp3tag but in the extended tag I cannot change the cover art, when I right-click the menu shows in light gray( not selec…
this one:
> [@Tags not shown properly](https://community.mp3tag.de/t/tags-not-shown-properly/13486/):
>
> Hi everyone, It's been days I'm trying to figure out why the release date won't show properly on my iPhone. I've edited the RELEASETIME and YEAR fileds to "2010-07-30T07:00:00Z". It iTunes, it seems to show the modification properly (Date de publication means Release Date): [image] Yet, on my iPhone, I only get the year of release: [image] Also, I've edited the COPYRIGHT field to « ℗ 2010 Arcade Fire Music, Llc » but it's not shown anywhere on iTunes nor on my iPhone. Here's what I should g…
or this one:
> [@MP3tag v2.51 doesn't change any .AAC tag field. Why?](https://community.mp3tag.de/t/mp3tag-v2-51-doesnt-change-any-aac-tag-field-why/13507):
>
> When something is put in any .AAC field or deleted from it, nothing appears or remains old text. It seems, that MP3tag is not working with AAC. MP3tag just can delete AAC's tags... Could anyone help me? Thanks wink
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### Author:  [@system](https://community.mp3tag.de/u/system)
#### Post date: [February 9, 2026, 12:28pm UTC](https://community.mp3tag.de/t/artist-and-cover-not-recognized-on-my-smartphone-with-aac-files/47549/3 "2026-02-09T12:28:24Z")