Hello 
I have around 70 mp3 files, with a really long title for each file.
First I have the Song name and then different texts, with different brackets.
Example
SongA(liveatafsdaa)
SongB[liveatassfsafsdfsdafsdaa]
SongC{liveataaasdffffa}
Does someone know, how i could remove the last part?
SongA
SongB
...
I dont wanna edit that on my own the whole night...
Sorry if my english has some errors 
Create an action of the type "Replace with regular expression" for TITLE.
Enter as search string:
.live.*
This assumes that the word "live" plus a leading character are the separators.
It reacts to the first "live" in the string.
Leave Replace string empty.
Dankee 
Hat super funktioniert 
Be care full to look on which files you use it.
A title like i.e. "Susannah's still alive" will change to Susannah's still ".