# Replacing w/ Regular Expressions Problem **URL:** https://community.mp3tag.de/t/replacing-w-regular-expressions-problem/9478 **Category:** Support **Created:** [December 5, 2009, 6:00am UTC](https://community.mp3tag.de/t/replacing-w-regular-expressions-problem/9478 "2009-12-05T06:00:17Z") **Posts on this page:** 1 **Showing post:** 2
### Author: ![DetlevD](https://community.mp3tag.de/user_avatar/community.mp3tag.de/detlevd/32/123_2.png) [@DetlevD](https://community.mp3tag.de/u/DetlevD) #### Post date: [December 5, 2009, 7:34am UTC](https://community.mp3tag.de/t/replacing-w-regular-expressions-problem/9478/2 "2009-12-05T07:34:34Z")
> [@bossvt](#): > > ... Basically I want to remove the following text (_Prod. By XXXX)_ with _XXXX_ being characters / name of the person who produced the file. For this example I want to remove _(Prod. By Lil Jon)_ ... There are some links about using of regular expressions in general: [Artist sortieren mit "The"](https://community.mp3tag.de/t/9347/6) To avoid unwanted side effects I would not use the special Mp3tag system field \_ALL, but the one and only tag field resp. Mp3tag system field which can carry the string in question, in your case it seems to be the \_FILENAME system field (or the TITLE tag field?). So your "replace using regular expression" action could be ... Field: Regular expression: (Prod. By .+) Replace matches with: Good luck! DD.20091205.0934.CET --- _[View the full topic](https://community.mp3tag.de/t/replacing-w-regular-expressions-problem/9478)._