# Help with custom Actions to replace colon
**URL:** https://community.mp3tag.de/t/help-with-custom-actions-to-replace-colon/71807
**Category:** Support
**Created:** [September 3, 2026, 3:40pm UTC](https://community.mp3tag.de/t/help-with-custom-actions-to-replace-colon/71807 "2026-09-03T15:40:29Z")
**Posts on this page:** 5
**Page:** 1
### Author:  [@Apesbrain](https://community.mp3tag.de/u/Apesbrain)
#### Post date: [September 3, 2026, 3:40pm UTC](https://community.mp3tag.de/t/help-with-custom-actions-to-replace-colon/71807/1 "2026-09-03T15:40:29Z")
Is there a way to configure an Action that would do the following:
1. When a colon ( : ) appears immediately after anything _other than a number_, replace it with a period ( . )
2. When the phrase " In A Minor" -- or any similar key designation -- appears, delete it
---
### Author:  [@LyricsLover](https://community.mp3tag.de/u/LyricsLover)
#### Post date: [September 3, 2026, 3:59pm UTC](https://community.mp3tag.de/t/help-with-custom-actions-to-replace-colon/71807/2 "2026-09-03T15:59:01Z")
Yes, 1) is possible with a regular expression.
However, you need to specify more precisely what you mean by 'other than a number' and exactly where you want it.
For example do you want to replace in the field `TITLE`
"This is : colon"
becomes
"This is . colon"
Please show us some real examples.
For 2: This would only be possible if you define what you mean by 'or any similar key designation'. A regular expression cannot 'guess' what you mean. You need to define exactly for example
" in A Minor" -\> delete
" in B Major" -\> Delete
" in A Minority " - leave untouched
Please show us some real examples.
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### Author:  [@ohrenkino](https://community.mp3tag.de/u/ohrenkino)
#### Post date: [September 3, 2026, 4:12pm UTC](https://community.mp3tag.de/t/help-with-custom-actions-to-replace-colon/71807/3 "2026-09-03T16:12:57Z")
> [@Apesbrain](#):
>
> 1. When a colon ( : ) appears immediately after anything _other than a number_, replace it with a period ( . )
You could try as
Format string: `$regexp(%title%,(\D+):,$1.)`
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### Author:  [@LyricsLover](https://community.mp3tag.de/u/LyricsLover)
#### Post date: [September 3, 2026, 4:32pm UTC](https://community.mp3tag.de/t/help-with-custom-actions-to-replace-colon/71807/4 "2026-09-03T16:32:46Z")
> [@ohrenkino](#):
>
> `$regexp(%title%,(\D+):,$1.)`
For those interested:
`\D+` means "any character that's **not** a digit, repeated at least once"
while
`\d+` means "a digit, repeated at least once"
`(\D+):` captures one or more non-digit characters followed by a colon.
In the replacement string, `$1` refers to the text captured by the first capture group, so `$1.` replaces each match with the captured text followed by a period.
---
### Author:  [@system](https://community.mp3tag.de/u/system)
#### Post date: [September 7, 2026, 7:04am UTC](https://community.mp3tag.de/t/help-with-custom-actions-to-replace-colon/71807/5 "2026-09-07T07:04:09Z")
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