Thanks for the workflow, it's super handy! I wanted to post this in case anyone else has a similar issue. When using keyword 'air on' I was being given a prompt to 'Choose Device' and a choice between my Apple TV as well as "msng". I have no idea what msng is, it does not appear in my options when manually turning on Airplay. But I was able to remove it and avoid the extra prompt by modifying the top Applescript in the workflow like this:
(I'm on 10.9 Mavericks if that's helpful)
set enheter to name of menu items of menu 1 of pop up button 1 of window 1 as list
set enheter2 to items 2 thru (number of items in enheter) of enheter
-- Beginning of custom code - Remove mysterious msng option
set itemsToDelete to {"msng"}
set cleanList to {}
repeat with i from 1 to count enheter2
if {enheter2's item i} is not in itemsToDelete then set cleanList's end to enheter2's item i
end repeat
set enheter to cleanList
set enheter2 to cleanList
