# Lowercase filter doesn't seem to work properly
**URL:** https://community.mp3tag.de/t/lowercase-filter-doesnt-seem-to-work-properly/11222
**Category:** Support
**Created:** [December 2, 2010, 4:11pm UTC](https://community.mp3tag.de/t/lowercase-filter-doesnt-seem-to-work-properly/11222 "2010-12-02T16:11:26Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@gjera](https://community.mp3tag.de/u/gjera)
#### Post date: [December 2, 2010, 4:11pm UTC](https://community.mp3tag.de/t/lowercase-filter-doesnt-seem-to-work-properly/11222/1 "2010-12-02T16:11:26Z")
Hi
I don't seem to find a way, how to filter the song fields that have beginning in lowercase.
%field% MATCHES ^\l - doesn't work
%field% MATCHES ^[a-z] - doesn't work
%field% MATCHES ^\U - doesn't work
%field% MATCHES ^a - doesn't work (for beginning with specific letter - lowercase 'a')
%field% MATCHES ^\x{0061} - doesn't work (for beginning with specific letter - lowercase 'a')
It always returns matches regardles of uppercase or lowercase...
Does anyone have any idea or is it bug...
Best regards.
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### Author:  [@ohrenkino](https://community.mp3tag.de/u/ohrenkino)
#### Post date: [December 2, 2010, 5:20pm UTC](https://community.mp3tag.de/t/lowercase-filter-doesnt-seem-to-work-properly/11222/2 "2010-12-02T17:20:50Z")
try a
%field% MATCHES (?-i)^\l
to find the lower case letters in the front
as a default mp3tag ignores any kind of case for the search pattern in the filter, so you have to force it every time.
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### Author:  [@gjera](https://community.mp3tag.de/u/gjera)
#### Post date: [December 2, 2010, 8:27pm UTC](https://community.mp3tag.de/t/lowercase-filter-doesnt-seem-to-work-properly/11222/3 "2010-12-02T20:27:36Z")
> [@ohrenkino](#):
>
> try a
> %field% MATCHES (?-i)^\l
> to find the lower case letters in the front
>
> as a default mp3tag ignores any kind of case for the search pattern in the filter, so you have to force it every time.
Wow. Who would think. It acually works. Although I don't know why...
Anyway. Thank you...
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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/lowercase-filter-doesnt-seem-to-work-properly/11222/4 "2026-02-09T12:22:43Z")