Apple CEO Steve Jobs has criticized music-subscription services for restricting the number of devices upon which legally-owned music can be played.

Jobs told IT News: "No one is going to use such services. If you legally acquire music, you need to have the right to manage it on all devices that you own."

Jobs attributed file-swapping service Napster's popularity to its ease of use rather than its free music content: "We believe that over 80 per cent of people are willing to pay, but there is no one offering you a choice."

He further complained that digital music services make it hard for consumers to burn tracks onto CDs.

This is hardly likely to endear him to Walt Disney Co., who accused Apple and other computer companies of profiting from piracy, during a Senate digital copyright hearing last week. Disney CEO Michael Eisner said computer makers' advertising encouraged people to buy their products to burn CDs and DVDs, singling out Apple's "Rip. Mix. Burn" campaign.