World's biggest record label, Universal Music Group, a subsdiary of French giant Vivendi, has begun selling music CDs with copy-protected MP3s in Australia and in South America. CDs have regular audio tracks that can be played with any regular audio player, but CDs also have encrypted MP3s that can be played only with Visiosonic's PCDJ software.
PCDJ software also allows users to "mix" their tracks rather freely, but also the resulting tracks can be played only with PCDJ software. In exchange, Universal will start selling PCDJ's software advertisement space and companies will split the revenue from the ads.
