# Trimming Fields?!
**URL:** https://community.mp3tag.de/t/trimming-fields/5916
**Category:** General Discussion
**Created:** [December 19, 2007, 4:55pm UTC](https://community.mp3tag.de/t/trimming-fields/5916 "2007-12-19T16:55:59Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@EvilKeg](https://community.mp3tag.de/u/EvilKeg)
#### Post date: [December 19, 2007, 4:55pm UTC](https://community.mp3tag.de/t/trimming-fields/5916/1 "2007-12-19T16:55:59Z")
I have all my MP3s harmonically archived, meaning that the Camelot Wheel is what is written to the comments field.
Some time ago I used Mixed in Key and it added the BPM after the key.
Is there a way I can create an action that trims this down? I would appreciate it if I had one that did both three char fields as well as 2 char.
At the moment they look like this
12A - 123.00
12A - 135.01
9A - 130
9B - 135
etc
I want it to look like:
12A
12A
9A
9B
as I already have a script that adds a leading zero to them and makes them look all nice 🙂
I have never used such a powerful mp3 tagging application in all my 15 years of MP3ing.. I am so impressed, please keep up the good work.
Regards
EvilKeg
[www.evilkeg.co.uk](http://www.evilkeg.co.uk)
archives.brap.fm/EvilKeg
---
### Author:  [@Florian](https://community.mp3tag.de/u/Florian)
#### Post date: [December 19, 2007, 6:17pm UTC](https://community.mp3tag.de/t/trimming-fields/5916/2 "2007-12-19T18:17:53Z")
This action should do the trick
_Action type:_ **Replace with regular expression**
_Field:_ **COMMENT**
_Regular expression:_ **(.+?) .\***
_Replace matches with:_ **$1**
[] case-sensitive comparison
Glad that you like Mp3tag 🙂