Server side audio file beat mixing

A server-side audio file beat mixing device and method are provided that enable users to create custom "DJ-style Beat Mixed" play lists of songs that are then mixed continuously on a host computer server matching beats of preset mix length, layering and mixing in of transitional sounds/effects, imposing audio processing technologies, and finally converting to a compressed audio format and delivered back to the customer for download, or shipped as a CD. Currently, multi-track editing programs like Sony Acid allow users to mix songs on their computers to create DJ-style mixed programs; however, this and all local computer software-based solutions require significant user skill, patience and time as well as computer processing power to accomplish similar results. This invention provides a better, easier solution that takes the time-intensive mixing process out of the user's hands.