Meanwhile, overall album sales -- which mostly encompass traditional CDs -- continued to sink, as the industry suffered another double-digit drop. Total album sales were down 12.7% in 2010, matching the decline posted last year. Album sales in 2008 and 2007 were down 14% and 15%, respectively.

“This felt like a really tough year,” said Jeff Castelaz, co-founder/CEO of the successful Silver Lake-based independent Dangerbird Records. “This was the year everyone had to get used to the new normal. There's no doubt it's harder to sell a record. There's so much noise and fragmentation. It's harder to say, 'If we get a band on a radio, we'll sell 50,000 singles.'"

There were still, of course, a number of mega-selling albums. Eminem's “Recovery” (Shady/Aftermath/Interscope) was the top-selling album of 2010, moving 3.4 million copies.

The rapper was followed by two representatives from the country world, as no rock artist had one of 2010's top-selling albums. Behind Eminem, Lady Antebellum's “Need You Now” (Capitol Nashville) sold 3.1 million and Taylor Swift's “Speak Now” (Big Machine) sold 2.9 million.

Swift was the year's top-selling artist, which combines numbers sold from her 2010 effort as well as prior albums. All told, Swift racked up 4.5 million in album sales. Eminem placed second with 4.3 million, but again, nary a modern rock act was among the year's best-selling artists. The Beatles finished at No. 10 with 1.7 million units sold.

Rock fared better in the digital realm. Train's “Hey, Soul Sister” was the year's top-selling digital download with 4.2 million purchases, and the Arcade Fire and Mumford & Sons” both snuck into the top-selling digital albums chart. The latter was again led by Eminem's “Recovery,” which sold 852,000 downloads.

Yet the underwhelming digital numbers cast a shadow over any million-selling albums, as the online sector has long been the one targeted for growth.

“From a unit standpoint, we're not going to see double-digit growth in digital sales,” Bakula said. “It's partly a penetration issue. Everyone who has a digital music player pretty much has one now.”

Heading into 2010, many in the industry hailed Sweden's music-sharing platform Spotify as a potential savior, and the company's founder, Daniel Ek, was even given a keynote speaking slot at noted industry conference South by Southwest.

Yet Spotify's U.S. delay has long been tangled in copyright negotiations with major labels, as the service is based on a so-called freemium model, allowing listeners to stream music for free and pay for a more comprehensive service.

Services offering legal ways of streaming music online may not be helping matters, however.

“I'm just concerned that we're growing young people who are not buying music,” said Dangerbird Record's Castelaz. "They're not even renting it. They're borrowing it on YouTube.”

Representatives from Universal Music Group and Warner Music Group did not respond to requests for comment. A spokesman for Sony BMG said executives who could comment were unavailable due to the annual Consumer Electronics Show getting underway in Las Vegas.

-- Todd Martens and Alex Pham

Images (top): Eminem. Credit: Associated Press

(bottom) Taylor Swift. Credit: Allen J. Schaben / Los Angeles Times