# Sentence case conversion issue
**URL:** https://community.mp3tag.de/t/sentence-case-conversion-issue/71559
**Category:** Support
**Created:** [July 3, 2026, 8:35am UTC](https://community.mp3tag.de/t/sentence-case-conversion-issue/71559 "2026-07-03T08:35:47Z")
**Posts on this page:** 6
**Page:** 1
### Author:  [@bollemanneke](https://community.mp3tag.de/u/bollemanneke)
#### Post date: [July 3, 2026, 8:35am UTC](https://community.mp3tag.de/t/sentence-case-conversion-issue/71559/1 "2026-07-03T08:35:47Z")
Could anyone help? I'm trying to convert the title field in sentence case, but want to create exceptions for things like . ( and -. So the title needs to look like: Introduction. Allegro non troppo. Or: Variation 23 (Andante con moto).
Any ideas?
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### Author:  [@LyricsLover](https://community.mp3tag.de/u/LyricsLover)
#### Post date: [July 3, 2026, 10:30am UTC](https://community.mp3tag.de/t/sentence-case-conversion-issue/71559/2 "2026-07-03T10:30:08Z")
Please show us a real current TITLE content and the exact result you want to achieve.
We need to see the differences that you want to convert.
Do you mean for TITLE:
The first character always in uppercase, everything else in lowercase.
Exceptions: After a dot `.` or opening parenthesis `(` or a hyphen `-` should the next character (or the second if it is a space?) be in uppercase too?
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### Author:  [@bollemanneke](https://community.mp3tag.de/u/bollemanneke)
#### Post date: [July 3, 2026, 10:47am UTC](https://community.mp3tag.de/t/sentence-case-conversion-issue/71559/3 "2026-07-03T10:47:29Z")
I can't show examples and I don't really need to. If my current title is All Like This, I want an action that makes a title field look like: Allegro vivace - Andante. Quasi allegretto. So basiclaly sentence case which is reset after . - (
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### Author:  [@ohrenkino](https://community.mp3tag.de/u/ohrenkino)
#### Post date: [July 3, 2026, 10:58am UTC](https://community.mp3tag.de/t/sentence-case-conversion-issue/71559/4 "2026-07-03T10:58:19Z")
The problem is the usually following space. So the real pattern would "dot space", "minus space" - and just the plain parenthesis.
Here is an example to get an upper case following the dot and the colon:
`$regexp($caps3('Allegro non troppo. Or: Variation 23 (Andante con moto)',),'(\.|:) (\w+)',$1 \u$2)`
Which leads to:
`Allegro non troppo. Or: Variation 23 (andante con moto)`
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### Author:  [@LyricsLover](https://community.mp3tag.de/u/LyricsLover)
#### Post date: [July 3, 2026, 12:47pm UTC](https://community.mp3tag.de/t/sentence-case-conversion-issue/71559/5 "2026-07-03T12:47:35Z")
If the OP wants the first character after an opening parenthesis also to be in uppercase, they could use something like this:
`$regexp($regexp($lower(%title%),'(^|\. |\(|: )([a-z])','$1\u$2'),'\bkv\.','KV.')`
This would convert the example
`ALLEgro Non Troppo. or Variation 23 (andante CoN MoTo: alLEgro, kV. beta)`
into
`Allegro non troppo. Or variation 23 (Andante con moto: Allegro, KV. Beta)`
**The two regular expressions are needed for the following reason:**
First, the entire TITLE content is converted to lowercase.
Then any lowercase letter `\[a–z\]` that appears at the beginning of the string, or directly after `.` or `(` or `: ` is capitalized using `\u`
Finally, the isolated word `kv.` (matched via `\bkv\.`) is replaced with `KV.`
Note:
It would be too complicated also to include other collection abbreviations like `Op.` or `BWV` (Bach) or `Hob.` (Haydn) or `WoO` (Beethoven) and many more.
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### Author:  [@system](https://community.mp3tag.de/u/system)
#### Post date: [July 10, 2026, 12:47pm UTC](https://community.mp3tag.de/t/sentence-case-conversion-issue/71559/6 "2026-07-10T12:47:53Z")
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