# Select string between parenthesis
**URL:** https://community.mp3tag.de/t/select-string-between-parenthesis/12623
**Category:** Support
**Created:** [October 24, 2011, 7:36pm UTC](https://community.mp3tag.de/t/select-string-between-parenthesis/12623 "2011-10-24T19:36:07Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@d\_abbatelli](https://community.mp3tag.de/u/d_abbatelli)
#### Post date: [October 24, 2011, 7:36pm UTC](https://community.mp3tag.de/t/select-string-between-parenthesis/12623/1 "2011-10-24T19:36:07Z")
Hello
I'm asking something which is probably pretty easy, but I can't find a way with the string functions (probably because I didn't understand how the $str\*\*\* functions work).
I want to select just the string between two square parenthesis.
As example, in:
1983 - Kill 'Em All [25DP 5339]
I just want [25DP 5339] (possibly with the parenthesis, but everything will work.
How can I do that?
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### Author:  [@pone](https://community.mp3tag.de/u/pone)
#### Post date: [October 24, 2011, 8:05pm UTC](https://community.mp3tag.de/t/select-string-between-parenthesis/12623/2 "2011-10-24T20:05:24Z")
> [@Daniele](#):
>
> As example, in:
> 1983 - Kill 'Em All [25DP 5339]
> I just want [25DP 5339] (possibly with the parenthesis, but everything will work.
assuming that the string is in the ALBUM tag field:
$regexp(%album%,'._['(.+)']._',$1)
or easier, but not usable as a scripting function which you can built into other actions:
assuming that you want the string into the CATALOG # tag field.
Action: Guess Value
Sourceformat: %album%
Guessing Pattern: %dummy% [%catalog #%]
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### Author:  [@system](https://community.mp3tag.de/u/system)
#### Post date: [February 9, 2026, 12:23pm UTC](https://community.mp3tag.de/t/select-string-between-parenthesis/12623/3 "2026-02-09T12:23:24Z")