Events are designed to perform only a single action of any type. So, you could have an event that flashed the screen, played a sound, displayed a message, and saved the tournament. But you can't have an event that flashes the screen multiple times, or plays more than one sound, or displays more than one message.
To work around it, you could use two events that trigger at different times, but the timing would also depend on the length of the audio file. So your suggestion of an event triggering off of "A level starts" and then another triggering off of "The clock ticks" is probably your best bet.
