So I'm running KDE settings, in kttsmgr.
I go add Talker, and try to add a swift talker:
/opt/swift/bin/swift -p "speech/rate=180" %t -o %w
..per the instructions here, which I suspect are out of date.
But when I go OK, it says invalid talker and wipes the settings.
How can I make Text to speech in KDE use the cepstral speech engine ?