Play Preamble is used to toggle Preamble playback on and off. If this checkbox is selected, a Preamble will be played before a Live page or Pre-Recorded Message. This function is dependant on other Vocia software features being active: the Audio File Manager must have Preambles loaded into it, the correct Priority Level must be assigned to the Page Code and the Paging Station in question must have a Preamble assigned to it at the specified Priority Level.