# Case conversion on Performer field messed up artists names
**URL:** https://community.mp3tag.de/t/case-conversion-on-performer-field-messed-up-artists-names/19234
**Category:** Support
**Created:** [August 16, 2017, 6:05pm UTC](https://community.mp3tag.de/t/case-conversion-on-performer-field-messed-up-artists-names/19234 "2017-08-16T18:05:22Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@Zapgok](https://community.mp3tag.de/u/Zapgok)
#### Post date: [August 16, 2017, 6:05pm UTC](https://community.mp3tag.de/t/case-conversion-on-performer-field-messed-up-artists-names/19234/1 "2017-08-16T18:05:22Z")
I fear I may have screwed up royally... My "Performer" fields were originally formatted like this:
PERFORMER: Paul McCartney (bass guitar)
I wanted to change the case of the text inside the parentheses to Mixed Case so I created this action:
Case Conversion
Field: Performer
Case Conversion: Mixed Case
Words begin from/after any of: (
I ran that action on all my files and it seemed like it did exactly what is was suppose to. Until a few minutes ago when a light bulb went of in my head and I decided to double-check my work, and as I feared my "Performer" fields now look like this:
PERFORMER: Paul Mc **c** artney (Bass Guitar)
I've confirmed it by looking at a couple of other files and every time there's a name that involved "Mc" or "O'", the rest of the name is in lower case.
Question 1: How do I resolve this issue in the smoothest possible way?
Question 2: Why did this happen in the first time? I get that I misunderstood the "Words begin from..." setting in some way but I can't figure out how it should be formatted to achieve the desired results.
Any help you guys can offer would be extremely appreciated. All I see in front of me right now is a ton of work and no other options.
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### Author:  [@ohrenkino](https://community.mp3tag.de/u/ohrenkino)
#### Post date: [August 16, 2017, 6:14pm UTC](https://community.mp3tag.de/t/case-conversion-on-performer-field-messed-up-artists-names/19234/2 "2017-08-16T18:14:53Z")
See e.g. this thread on case conversion: [/t/11684/1](https://community.mp3tag.de/t/11684/1)
or this: [/t/15863/1](https://community.mp3tag.de/t/15863/1)
In respect to the McCartney case: please watch out for artists like MC Sar and the Real McCoy... two kinds of MC there.
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### Author:  [@Zapgok](https://community.mp3tag.de/u/Zapgok)
#### Post date: [August 16, 2017, 8:10pm UTC](https://community.mp3tag.de/t/case-conversion-on-performer-field-messed-up-artists-names/19234/3 "2017-08-16T20:10:51Z")
Thank you! I actually use the actions mentioned in your first link but it never occurred to me to modify it for the Performers field. That should save me a ton of time and I'm extremely grateful! I'm going to read through the second link really carefully so that I don't repeat my mistake.
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### Author:  [@system](https://community.mp3tag.de/u/system)
#### Post date: [February 9, 2026, 12:26pm UTC](https://community.mp3tag.de/t/case-conversion-on-performer-field-messed-up-artists-names/19234/4 "2026-02-09T12:26:57Z")