# sayregexp - how to use it?
**URL:** https://community.mp3tag.de/t/sayregexp-how-to-use-it/6993
**Category:** Web Sources Discussion
**Created:** [June 30, 2008, 10:48am UTC](https://community.mp3tag.de/t/sayregexp-how-to-use-it/6993 "2008-06-30T10:48:03Z")
**Posts on this page:** 1
**Showing post:** 8
### Author:  [@pone](https://community.mp3tag.de/u/pone)
#### Post date: [April 1, 2011, 5:42pm UTC](https://community.mp3tag.de/t/sayregexp-how-to-use-it/6993/8 "2011-04-01T17:42:06Z")
> [@DetlevD](#):
>
> Hmm ... try **""**
> ... might be a joking on April 1st.
> Hmm ... try \x13\x10 and such other things.
>
> Is it a text file with CRLF line delimiter sequence?
> Or maybe only LF line delimiter?
> Or maybe only CR line delimiter?
>
> DD.20110401.2133.CEST
haha, you got me. I was already trying around with "" and "" before you edited your post.
I don't understand CR and LF
It's for this here:
[Barcode automatisch einfügen](https://community.mp3tag.de/t/11796/5)
instead of ", " in
sayregexp "(?\<=\Barcode:).\*?(?=)" ", "
i would like to have a linebreak as seperator.
but it looks like the seperator can't be a regular expression or a mp3tag scripting $function.
"\\" would work to create a multivalue field, but I think there is no code which creates a linebreak like \\ creates a "mulitvalue tag field break"
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