Emergencies such as accidents, people getting ill and equipment failure do happen. So with accidents and people getting ill, life happens. First our team members give us as much notice as possible if something has gone wrong. Our stand by team will head to an event with equipment, a dj may arrive from another location and our planning team will send a pdf of your party to the dj enroute and activate your music folder online.
With equipment failures...technology is like a car. If its not looked after it will fail eventually. Luckily we test our equipment on a regular basis. In the old days it would be a vinyl record skipping. Now its a file glitch.