M1 allows up to 10 “Announcers” to be named and day-parted. When an announcer name is clicked into any non-music card, then that one can/will be scheduled ONLY in the hours assigned. This will allow you to have, for example, one single Promo category containing tracks recorded by all of the stations’ announcers; M1 will schedule the morning guy’s promos in his shift hours and no others.
Later Edit: In this video, I say a one-second separation is enough for the announcers. There, I was thinking only about preventing back-to-back play of two recorded announcements by the same voice.