Foo Fighters
Courtesy of RCA Records

The Foo Fighters’ eighth studio album is all wrapped-up. And the result is apparently “epic.”

That’s the word from legendary rock producer Butch Vig, who shared the good news via his Twitter account. “We are officially done with the new Foo Fighters album. 23 straight days mixing! IT'S EPIC!!!” he tweeted on Wednesday.

It’s the first update from Vig since July 11. Then, as now, the recordings sounded “epic.” He wrote, "Just printed our first mix for the new Foo's album! It sounds EPIC!"

Vig and Foo Fighters frontman Dave Grohl have already made history together, on several occasions. Vig produced the great Nirvana album “Nevermind” from 1991, and worked on the Foos’ 2009 greatest hits and the 2011 set “Wasting Light.” He's had a hand in many of the great rock records of the past 25 years, including albums released by Sonic Youth, Smashing Pumpkins, L7, House of Pain and his own project Garbage.

Dave Grohl On New Foo Fighters Album: 'It's All About Reinventing The Process'

The new Foos album is expected out this fall. And with the as-yet-untitled effort, HBO will air a new series chronicling the "eight-city odyssey during which the record was created." As previously reported, Grohl directed the series which visits studios in eight cities: Chicago, Austin, Nashville, Los Angeles, Seattle, New Orleans, Washington, DC and New York. The veteran rockers recorded one song at each stop with local legends sitting in.