It enables users to swap songs by trading files in the MP3 format - a data-compression formula that turns CD's music tracks into computer files.

The unlikely duo will swap songs with Madonna, 34, singing classics like New York, New York and Frank, 76, crooning Like A Virgin.

They swapped songs with each other, while the tape rolled.

The family evening would be spent watching home movies, mending harness, swapping jokes and songs around the fire, or playing a lively game of Twenty Questions.

The libertarian stripe found in many meets some seeming contradictions when the discussion turns from swapping songs to sharing personal information.

In his vision, people around the world would post stories via anonymous P2P services like those used to swap songs.

Moreover, analysts said that there are two different types of people swapping songs online.

The free service enables users to swap songs, in the form of MP3 files, between their computers.

At night, he hung out at the Tally-Ho Tavern, where he drank beer, ate barbecue and swapped songs.

Rather than each performer's doing a separate set, as is the norm, all four artists will be on stage together, swapping ideas and songs and fielding questions from the audience.