An audio analysis system that may analyze participant audio input in a game spectating environment. The audio analysis system may receive audio input for participants (broadcasters and/or spectators) in a game spectating system. The audio analysis system may analyze the audio input to generate audio analysis information for broadcasts, and provide the information to the game spectating system. The audio analysis information may be applied in the game spectating system in various ways. For example, the information may be used to determine active or popular broadcasts, broadcasters, games, and/or recordings of broadcasts, and the active or popular content may be indicated to spectators via a game spectating user interface. The audio analysis system may provide an application programming interface (API) to receive the audio input and to provide audio analysis information.