[Problem] To reduce user's workload when preparing a playlist. [Solution] A playlist preparation terminal 2 carries out face recognition processes on the image data of listeners captured for each room from a room A to a room C, and generates listener information including the atmosphere, age group, and a male-to-female ratio of a listener group made up of the listeners captured in the image data. The playlist preparation terminal 2 then prepares a playlist by selecting music data from among music data belonging to the genre information preliminarily associated with the listener information, and multicasts the playlist together with the designation data for the wireless speakers 1-1 to 1-3 from which to output music. As a result, the playlist preparation terminal 2 allows the wireless speakers 1-1 to 1-3 from which to output the music to reproduce the music data according to the playlist and output the music.