All the tunes in this booklet have one thing in common: they are based on folksongs. Pop singers or jazz musicians have made commercial dance music out of them, and in many instances have so thoroughly “updated” them that their origin in folklore is not recognized by the listener. These songs offer an interesting insight into the manner in which the pop music industry treats and exploits, as international common property, so-called free works, that is, folksongs or melodies whose composers have been dead for more than 70 years. On sheet music and record labels, the arrangers are often named in so misleading a fashion that they can easily be taken for the authors. “Aura Lee” is the title of a folksong; the song, however, became popular under the title “Love me tender” and is regarded as the work and the property of the singer Elvis Presley (1935 — 1977). Equally confusing is the title “Candle Light Waltz”, which is based on the Scottish tune “Auld Lang Syne”. And for long-time favourites like “La Bamba”, “Guantanamera”, “El Condor Pasa”, etc.