StageMaster
StageMaster is software for managing broadcasts, stage productions
...It can play the required video and audio, launch a DAW automatically, and send web pages, still images, and other content to an HDMI output.
It can be used for single-operator control of radio broadcasts and events, as well as for automated, program-driven or slave operation in a hall. On stage, it can send a main output alongside performer-specific channels.
Note that an audio interface is required to send audio from a Mac or PC to a sound system. There are many audio interface models available worldwide, and not all of them have been verified to work.