5. A method of delivering promotional content, the method comprising: receiving an audio query; recognizing that the audio query matches an audio reference; selecting an aggregate experience category associated with the audio reference; following a link between the aggregate experience category and promotional content; and delivering the promotional content, wherein the aggregate experience category is a type of content.
10. The method of claim 5 , wherein the aggregate experience category is associated with the audio reference by selecting one of: an artist, an album, a version of song, similar artists, and recommended songs in a cluster based on the artist.