In Maestro 3.3.4 and above, you can perform functions triggered through the actual play of a cart. For example, if a user wanted to deactivate the queue window anytime a specific cart plays, they could create a function in Mconfig/Workstations/Functions (example STOPQUEUE), with an action of Set queue state, deactivate. Then, in the Maestro, bring up the specific cart in the Record Control Window, go to more info, and under Tag Text (appears as song notes under carts that fall into range of Music cart types), and as the beginning characters, type "action:stopqueue". In this scenario, ?any? time that specific cart begins playing, it will immediately trigger function STOPQUEUE at the beginning of the cart.