Hi Jan,
I have multiple Text Sources running in sequence. Works really well. Now Playing (From Station Playlist), Program Names (using Task Scheduler to alter the N/A text. Such as 'The Midnight Jukebox' ), Standard messages (such as 'Local Radio Southern Gippsland'), Special announcements (such as 'Christmas Carols @ Town Hall 12th Dec'), Local town locations (such as 'Archies Creek's 3mFM').
In the case where 'Text Replacing' results in a condition where the External Radiotext should not be updated, suggest that the next Text Source be used.
In my case, if Artist or Title are blank, it means that a track has been manually loaded & generally means the text info is not really suitable for public display, but also means that the previous 'Now Playing' data is no longer valid. So I could either just display blank text, which would look strange or move to the next Text Source.
Perhaps each Text Source setup could be altered to optionally (by tickbox) move to the next Text Source source if the text result is blank after the Text Replacing process is completed?
cheers,
Rod