LOS ANGELES – Billionaire Len Blavatnik is spending $1.3 billion to buy Warner Music Group Corp. a decade into a steep decline in CD sales for the music industry.

That could make him a sucker in line for many more years of slashing staff, or a savant for buying the company at the start of a digital music revolution.

The deal values Warner Music at $3 billion including debt and cash — even higher than the $2.6 billion it sold for in 2004 when the industry was twice as big.

FROM FILM MUSIC TO FAITH HILL

Warner Music was formed in 1929 as a way for Warner Bros. Pictures to acquire the copyrights of music for films. Warner Bros. Records was created in 1958 to distribute movie soundtracks and went on to discover such artists as Neil Young and the Grateful Dead.

Today, the company is home to Faith Hill, the Red Hot Chili Peppers, Linkin Park and Josh Groban.

A 10-year battle with online piracy has devastated the industry. Warner is believed to have coped with it better than other recording companies, but some industry analysts praised Warner’s sellers for cashing out.

Standard & Poor’s equity analyst Tuna Amobi calls it “one of the best deals in the music space of all time” — at least for the sellers.

His opinion of the buyer wasn’t so rosy. “Any time you have deep-pocketed investors in some glamour business, anything can happen,” Amobi said.

It’s possible Blavatnik’s purchase, through the Access Industries company he controls, could turn out to be wise.

He’s essentially buying into an industry that can’t get much worse. And he’ll be able to reap benefits from cutting duplicate jobs if he successfully bids for Britain’s EMI Group Ltd., which Citibank is expected to sell soon.

Meanwhile, digital innovations could be preparing the industry for a revival.

Recent sales figures suggest the deal is well timed.

Sales of albums in the United States increased 1.4 percent in the first four months of the year to 146 million, according to Nielsen SoundScan. Although U.S. sales of CDs fell by 9 percent during the same period, that’s less than the 20 percent drop in 2010.

If the gains continue, it could mark the first time that album unit sales, helped by digital downloads, have grown since 2004.

The lift didn’t just happen because of one-time factors such as a slew of top artists releasing albums all at once, according to Nielsen analytics vice president David Bakula. Not even discounts can account for the gains; track sales rose even though most new ones now sell for $1.29 apiece, up from 99 cents a couple years ago.

PAYING LESS, EXPECTING MORE

Still, there’s little question that people are paying less for music and expecting more. Total U.S. sales were just $6.3 billion last year, down from $14.3 billion at the peak in 2000.

People are demanding better ways to store, play and share music, on any device and at any time, and they don’t want to pay a lot for it, said Adam Klein, the chief executive of digital music club eMusic.

Consumers’ “perception of value has changed and will continue to change,” he said. “The industry has got to move quite quickly to keep up with that or piracy will remain rampant.”

Amazon.com Inc. has a new service that enables people to share, review and listen to music without having to store it on personal devices at all. Google Inc. and Apple Inc. are believed to be working on something similar.

Digital music is partly being held back by the huge costs of running music labels now and the high royalties they must demand from innovators, Klein said. Cutting costs will help foster the technology that will entice more people to pay for music.

It’s a process that will undoubtedly mean more layoffs. Warner now has just 3,700 employees, down from 5,100 in late 2003.

Blavatnik, 53, doesn’t face such hurdles blindly. The Russian-born investor was part of the group led by Chief Executive Edgar Bronfman Jr. that bought the company from Time Warner Inc. in 2004. He served on its board until 2008 and still has about a 2 percent stake.

Those investors slashed payrolls and took other measures such as signing artists to all-encompassing rights deals, which gave Warner Music revenue from concerts and merchandise to cope with declines in recorded music. They took the company public a year later to help recoup their investment.

Bronfman and partners Thomas H. Lee and Bain Capital have agreed to vote their combined 56 percent stake in favor of the deal. It would pay shareholders $8.25 per share when it closes. That’s expected to happen by September.

MANY HAPPY RETURNS

Investors have already gotten back their $1.05 billion investment, plus 30 percent more thanks to special dividends and management fees over the years. The sale means they’ve nearly doubled their money.

Blavatnik may need to acquire other companies to achieve bigger cost savings to make the business work. Many people believe his decision to keep Bronfman as CEO means that Blavatnik is eyeing a bid for EMI, which Bronfman has tried and failed to buy in the past.

Easing worries about the Warner sale is the fact that Blavatnik understands the digital business, said Fred Goodman, author of “Fortune’s Fool: Edgar Bronfman Jr., Warner Music, and an Industry in Crisis.”

Blavatnik once licensed music recordings from Warner for an Internet and cellphone service he operated in Russia.

“Many of the people who were interested in buying Warner Music were not really interested in doing anything other than managing it down … making the company smaller and smaller and taking profits out by shrinking,” Goodman said. “I think Blavatnik’s one of the few guys where you think that might not be the case.”