Abstract: A request for an audio arrangement having one or more target audio arrangement characteristics is received. One or more target audio attributes are identified based on the one or more target audio arrangement characteristics. First audio data is selected. The first audio data has a first set of audio attributes, which comprises at least some of the identified one or more target audio attributes. Second audio data is selected. The second audio data has a second set of audio attributes, which comprises at least some of the identified one or more target audio attributes. One or more mixed audio arrangements are output and/or data useable to generate the one or more mixed audio arrangements is output. The one or more mixed audio arrangements are generated by at least the selected first and second audio data being mixed using an automated audio mixing procedure.