A wagering game system and its operations are described herein. In some embodiments, the operations can include determining a classification of a first sound provided by a first wagering game application for presentation via one or more output devices of a wagering game machine. Further, a second wagering game application provides a second sound for concurrent presentation via the one or more output devices. The first wagering game application is independent from the second wagering game application. In some embodiments, the operations further include determining a prioritized relationship between the first sound and the second sound based on the classification, and controlling presentation of the first sound and the second sound via the one or more output devices according to the prioritized relationship.