Abstract: The advent of audio compression algorithms in combination with high-speed Internet access has enabled consumers to download digital audio files such as music single tracks from the Internet within seconds to minutes. Whereas legitimate service providers offer music files for download on payment, many consumers download music files illegally at no direct cost by using file sharing or similar services. This leads to a potential loss in revenues for the creators, owners, sellers, and/or distributors of digital audio content. The present invention relates to a method and system for selling and/or distributing digital audio files comprising at least one advertisement message part in addition to at least one music entertainment part.