(Title Case

Please can someone tell me what the regex is for titlecasing words which come after a bracket?

If I have: (a Dark Night Alone).mp3
and a i want: (A Dark Night Alone).mp3

I'm sure I need a quick action and a regex to convert it!?

Thanks in advance for helping a newbie :slight_smile:

Action: Case Conversion
Field: TITLE
Case Conversion: Mixed Case
Words begin from/after any of: (-

Thank you very much.