Apple confirms mystery launch event

Apple has officially set 9 September as the date for its next music-themed product launch event in San Francisco.

Apple unveiled redesigned iPod Nano music players at a similarly timed event last year.

The iPod and iPhone maker sent an invitation to journalists yesterday that reads, "It's only rock and roll, but we like it," borrowed from a Rolling Stones lyric.

Apple keeps a tight lid on upcoming products and hasn't confirmed any rumoured developments, including a plan to package extra digital content with albums sold on iTunes, and a new tablet-style device.