Switching first and last names in fields with multiple artists/soloists

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Need help with regex for ARTISTSORT
Multiple value artist tag to multiple value artistsort
/t/17090/1

Try this ...

From: SOLOIST = 'Rolando Villazon\\Anna Netrebko\\Bryn Terfel'
To : TEST = 'Villazon, Rolando\\Netrebko, Anna\\Terfel, Bryn'

TEST <== $trimRight($regexp($meta_sep(SOLOIST,';')';','(.+?) (.+?);','$2, $1\\\\'),'\')

DD.20170214.1422.CET