# Action to affect multiple tags? **URL:** \ **Category:** Support\ **Created:** [July 23, 2022, 4:19am UTC](https://community.mp3tag.de/t/action-to-affect-multiple-tags/57981 "2022-07-23T04:19:32Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![xterminal](https://community.mp3tag.de/user_avatar/community.mp3tag.de/xterminal/32/11916_2.png) [@xterminal](https://community.mp3tag.de/u/xterminal)\ **Post date:** [July 23, 2022, 4:19am UTC](https://community.mp3tag.de/t/action-to-affect-multiple-tags/57981/1 "2022-07-23T04:19:32Z")
I've read pieces of posts that offer pieces of a solution here, but I just can't put them all together in my head correctly to come up with the answer for this specific situation... I have thousands of files from VA comps that are terribly-named. (Thanks, bandcamp.) They mostly conform to the same convention... TITLE: [artist] - [title] ARTIST: V.A. [name of label that put out comp] Conceptually, this is a simple fix: 1. Overwrite ARTIST with the [artist] part of TITLE 2. Delete the leftmost portion of TITLE up to and including " - " From the reading I've been doing tonight, I am reasonably certain this requires creating a new, custom action, and the nature of the problem dictates the use of regular expressions. However, I can't seem to find an example using a regex action that affects multiple fields. Can someone whose brain isn't as addled as mine seems to be help me figure out how to put all the pieces together into a coherent solution? Thanks. ---
**Author:** ![poster](https://community.mp3tag.de/user_avatar/community.mp3tag.de/poster/32/4881_2.png) [@poster](https://community.mp3tag.de/u/poster)\ **Post date:** [July 23, 2022, 4:50am UTC](https://community.mp3tag.de/t/action-to-affect-multiple-tags/57981/2 "2022-07-23T04:50:43Z")
If I understand you correctly, your use of [artist] and [title] does not mean that square brackets are actually used in the title. in this case you could use an action of the type "Guess values". Source: `%title%` Guessing pattern: `%artist% - %title%` You don't tell us anything about the filename. If there are title and artist in the filename it could also be possible to use the converter Filename-\>Tag. ---
**Author:** ![system](https://community.mp3tag.de/uploads/default/original/2X/c/ce7035d426cb755a7916793326d23b465222a407.png) [@system](https://community.mp3tag.de/u/system)\ **Post date:** [February 9, 2026, 12:29pm UTC](https://community.mp3tag.de/t/action-to-affect-multiple-tags/57981/3 "2026-02-09T12:29:51Z")