CUPERTINO, Calif. ( TheStreet -- The Apple ( AAPL) rumor mill is spinning again. The consumer tech giant is said to be planning one of its keynote events for Sept. 9, and speculation is mounting that the firm will make a major music announcement.

The AllThingsDigital Web site quoted "multiple music industry sources" who said that Apple was planning an event for the week of Sept 7. Apple has often used the week following Labor Day to make major launches so this would not be unusual. Last year, for example, Apple unveiled its new iPod nano and iPod touch on Sept. 9, as well as iTunes version 8.

Intriguingly, Sept. 9 is also the launch date for "The Beatles: Rock Band" video game, and there is growing speculation that Apple will unveil the Fab Four's iTunes catalog on the same day.

Apple's Magical Mystery Event

The Beatles' music is not yet available for digital download, but would certainly give Apple's iTunes business a shot in the arm. Apple reach the 8 billion mark for iTunes downloads earlier this year, although the Cupertino, Calif.-based company is not one to sit on its hands when it comes to a new revenue opportunity.

The Financial Times recently reported that Apple is even working with music labels such as EMI and Sony Music to stimulate digital sales of albums. Code-named "Cocktail", the project will bundle interactive booklets and sleeve notes with music downloads, and is expected to be launched in September.

There has also been talk that Apple could launch its tablet device as early as next month, although recent media reports say that this is unlikely to happen until 2010.

The Sept. 9 event will take place in San Francisco, most likely at the Yerba Buena Center for the Arts, where previous Apple launches have taken place, according to AllThingsDigital. Upgrades to the iPod line are also expected, the Web site added.

At this stage, however, there have been no hints that Apple CEO Steve Jobs will make an appearance at the rumored keynote event, his first since taking a medical leave of absence from the company.

While My Video Stock Gently Weeps

True to form, Apple declined to provide a comment for this story when contacted by TheStreet.com, ensuring that the company's plans retain an ongoing air of mystery.

Shares of the iPhone maker, which competes with PALM ( AAPL) and RIMM ( RIMM), rose $3.78, or 2.37%, to $163.37 Tuesday, outpacing the broader advance in tech stocks that saw the Nasdaq rise 1.27%.

--Written by James Rogers in New York

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