# Is there a way to let mp3tag read an unknown mp3 tag?

**URL:** https://community.mp3tag.de/t/is-there-a-way-to-let-mp3tag-read-an-unknown-mp3-tag/50174
**Category:** General Discussion
**Created:** [September 12, 2020, 9:23am UTC](https://community.mp3tag.de/t/is-there-a-way-to-let-mp3tag-read-an-unknown-mp3-tag/50174 "2020-09-12T09:23:54Z")
**Posts on this page:** 6
**Page:** 1

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### Author: ![rama](https://community.mp3tag.de/user_avatar/community.mp3tag.de/rama/32/10166_2.png) [@rama](https://community.mp3tag.de/u/rama)
#### Post date: [September 12, 2020, 9:23am UTC](https://community.mp3tag.de/t/is-there-a-way-to-let-mp3tag-read-an-unknown-mp3-tag/50174/1 "2020-09-12T09:23:54Z")

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Hi  
is there a way to let mp3tag read an unknow mp3 tag?

for example RVAD or RVA2 for mp3 ?

or itunes TCMP means iTunes Compilation

thanks

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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: [September 12, 2020, 9:35am UTC](https://community.mp3tag.de/t/is-there-a-way-to-let-mp3tag-read-an-unknown-mp3-tag/50174/2 "2020-09-12T09:35:18Z")

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> [@rama](#):
>
> or itunes TCMP means iTunes Compilation

This field can be read already, see

> **[Tag Field Mappings – Mp3tag Documentation](https://docs.mp3tag.de/mapping/)**
>
> Overview of all available tag fields, their names in Mp3tag, and how they are mapped to the internal structures of the different tag formats. Mp3tag is the universal Tag Editor.

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### Author: ![LyricsLover](https://community.mp3tag.de/letter_avatar_proxy/v4/letter/l/c6cbf5/32.png) [@LyricsLover](https://community.mp3tag.de/u/LyricsLover)
#### Post date: [September 12, 2020, 10:57am UTC](https://community.mp3tag.de/t/is-there-a-way-to-let-mp3tag-read-an-unknown-mp3-tag/50174/3 "2020-09-12T10:57:39Z")

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> [@rama](#):
>
> is there a way to let mp3tag read an unknow mp3 tag?
> 
> for example RVAD or RVA2 for mp3 ?

This two tags are not "unknown":  
RVAD is the id3v2.3 tag for "Relative volume adjustment"  
RVA2 is the id3v2.4 tag for "Relative volume adjustment"

But, as @ohrenkino already wrote, both tags are currently not supported by Mp3tag.

You can find the detailed description in this document  
[https://id3.org/d3v2.3.0](https://id3.org/d3v2.3.0)  
just search for "4.12. Relative volume adjustment"

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<div class="post-metadata">

### Author: ![rama](https://community.mp3tag.de/user_avatar/community.mp3tag.de/rama/32/10166_2.png) [@rama](https://community.mp3tag.de/u/rama)
#### Post date: [September 13, 2020, 5:03am UTC](https://community.mp3tag.de/t/is-there-a-way-to-let-mp3tag-read-an-unknown-mp3-tag/50174/4 "2020-09-13T05:03:42Z")

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hi  
but is there a way to let mp3tag to read them ?  
for example config -\> tags -\>mapping ?  
thanks

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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: [September 13, 2020, 7:55am UTC](https://community.mp3tag.de/t/is-there-a-way-to-let-mp3tag-read-an-unknown-mp3-tag/50174/5 "2020-09-13T07:55:35Z")

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> [@rama](#):
>
> config -\> tags -\>mapping

No, no way. I assume you could have guessed by now.

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### Author: ![rama](https://community.mp3tag.de/user_avatar/community.mp3tag.de/rama/32/10166_2.png) [@rama](https://community.mp3tag.de/u/rama)
#### Post date: [September 13, 2020, 8:43am UTC](https://community.mp3tag.de/t/is-there-a-way-to-let-mp3tag-read-an-unknown-mp3-tag/50174/6 "2020-09-13T08:43:58Z")

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hi @ohrenkino

thank you so much!