in general the featured artists aren't so much part of the title as something to go in the artist tag, leaving album artist constant for the album
I disagree on two counts...
1) When you rename a complete album with the artist as folder name e.g. ..\%artist%\%year% %album%\%track% %track title%
... having NON consistent %artist% fields that carry featured artist names really screws thing up.
2) With hip-hop and r&b the featured artist usually come with the title.
3) Songname featuring Artist is more natural than Artist featuring Artist (personal preference)
I've thought to use %album artist% as well as %artist%, but this deviates away from idtags v1 so I've resisted and I don't see car stereos and other devices supporting these other tags in a hurry either.
Anyway, this is all a diversion
back to the wish ...
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Filtering the title with regexes is already possible if you add it as a filter to specific provider configurations
Erm, where might that be? (documentation?)
In regards to setting up another login on another site, meh! Here is central enough for me :p
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