Chapter 33 · Comfortably Rich 367 Question 4: What is the control information source? In this case, it is the band itself. Ideally, the systems should sync to the band, but there must be some general constraints to achieve the synchrony the band desires. Question 5: What is the type of user interface required? All the system operators on the tour are skilled technicians, so they want very sophisticated and complete user interfaces. Question 6: What devices must be controlled/connected? Let's look at each in detail. T HE S YSTEMS The band's longtime production manager is in charge of contracting the various people and companies that will supply and operate gear for the tour. He decides to bring in a show control consultant to ensure that the critical sequences work correctly. Lighting