Rename different album styles

Hi
I have filenames with different styles:

Greatest Hits Of The Millennium 70s vol.1
Romantic Collection vol. 4
[Greatest Hits vol II (1978-1985) -> There may be "* vol. II *" ?]
vol 5
etc.

How can I rename all parts of the album name from (vol.1, vol. 4, vol 5) of (vol. 1, vol. 4, vol. 5, etc.) with the "Replace with regular expression"?

I would not use regular expressions as you have constants to replace
So I would use a "normal" replace but a an action group with a chain of them
"vol " -> "Vol. "
"vol" -> "Vol"
" V " -> " 5 "
" IV " -> " 4 "
" III " -> " 3 "

etc.

'i_edgars', you have posted into the wrong forum thread.
This pinned thread is for presentation of working examples, not for asking problematic questions.
Nevertheless I will answer. The moderator may split this into a separate thread.

from " vol.1, Vol. 4, vol 5"

to " vol. 1, vol. 4, vol. 5"

$regexp(%ALBUM%,'\svol\.?\s*(\d+)',' vol. $1',1) from " vol.1, vol. 4, vol 5, vol II, Vol. iv"

to " vol. 1, vol. 4, vol. 5, vol. II, vol. IV"

$regexp(%ALBUM%,'\svol\.?\s*(\d+|iii|ii|iv|ix|i|viii|vii|vi|v|x)',' vol. \U$1',1) from " vol. 1, vol. 4, vol. 5, vol. II, vol. IV"

to " vol. 1, vol. 4, vol. 5, vol. 2, vol. 4"

$replace(%ALBUM%, ' III',' 3',' II',' 2',' IV',' 4',' IX',' 9', ' I',' 1',' VIII',' 8',' VII',' 7',' VI',' 6',' V',' 5',' X',' 10')

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