# partial case conversion
**URL:** https://community.mp3tag.de/t/partial-case-conversion/11398
**Category:** Support
**Created:** [January 5, 2011, 1:29pm UTC](https://community.mp3tag.de/t/partial-case-conversion/11398 "2011-01-05T13:29:04Z")
**Posts on this page:** 6
**Page:** 1
### Author:  [@zomgix](https://community.mp3tag.de/u/zomgix)
#### Post date: [January 5, 2011, 1:29pm UTC](https://community.mp3tag.de/t/partial-case-conversion/11398/1 "2011-01-05T13:29:04Z")
got filenames in a %1 - %2 %3.mp3 format
the Mixed Case conversion works like a charm, only that I need %1 to stay UPPER case. is there a way to separate the changes? please help
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### Author:  [@pone](https://community.mp3tag.de/u/pone)
#### Post date: [January 5, 2011, 2:44pm UTC](https://community.mp3tag.de/t/partial-case-conversion/11398/2 "2011-01-05T14:44:19Z")
Tag - Filename Converter:
$upper($regexp(%\_filename%,(._) - ._,$1)) - $caps($regexp(%\_filename%,.\* - (.\*),$1))
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### Author:  [@zomgix](https://community.mp3tag.de/u/zomgix)
#### Post date: [January 5, 2011, 3:30pm UTC](https://community.mp3tag.de/t/partial-case-conversion/11398/3 "2011-01-05T15:30:43Z")
thanks for the reply! unfortunately my %3 sometimes also includes "-" and messes it all up ☹
another solution for me would be a script to uppercase the first two letters of the filename
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### Author:  [@DetlevD](https://community.mp3tag.de/u/DetlevD)
#### Post date: [January 5, 2011, 4:41pm UTC](https://community.mp3tag.de/t/partial-case-conversion/11398/4 "2011-01-05T16:41:12Z")
> [@zomgix](#):
>
> got filenames in a %1 - %2 %3.mp3 format
> the Mixed Case conversion works like a charm, only that I need %1 to stay UPPER case. is there a way to separate the changes? please help
1.
**Convert** | **Filename - Filename** | **ALT+3**
_Select format string_
Old filename pattern:
**%1 - %2 %3**
New filename pattern:
**$upper(%1) - $caps(%2 %3)**
Preview
**JOHNNY - Greatest More.mp3**
1.
**Convert** | **Filename - Filename** | **ALT+3**
_Select format string_
Old filename pattern:
**%1 - %2 %3**
New filename pattern:
**$upper($left(%1,2))$cutLeft(%1,2) - $caps(%2 %3)**
Preview
**JOhnny - Greatest More.mp3**
DD.20110105.1844.CET
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### Author:  [@zomgix](https://community.mp3tag.de/u/zomgix)
#### Post date: [January 5, 2011, 5:00pm UTC](https://community.mp3tag.de/t/partial-case-conversion/11398/5 "2011-01-05T17:00:08Z")
> [@DetlevD](#):
>
> $upper(%1) - $caps(%2 %3)
why haven't I typed that intuitively? pure logic 🙂 again, thanks a lot! apparently theres nothing this software can't do 😉
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### Author:  [@system](https://community.mp3tag.de/u/system)
#### Post date: [February 9, 2026, 12:22pm UTC](https://community.mp3tag.de/t/partial-case-conversion/11398/6 "2026-02-09T12:22:48Z")