The US recording industry is taking legal action against 750 computer users believed to be distributing music illegally over the internet.
Music downloading is said to be disrupting work at US colleges
Students at 13 universities are among those targetted by the Recording Industry Association of America (RIAA).
Another 213 people who were identified earlier but failed to settle their cases are also being sued.
Record companies have taken action against a total of 6,191 illegal song swappers since September 2003.