Nirvana frontman Kurt Cobain was working on a solo album when he committed suicide in 1994, a former guitarist for the band of Cobain's widow said in an interview with music TV channel Fuse.
"That's really what he was going towards, a solo album but working with different people," Eric Erlandson -- who played with Hole, a band founded by Courtney Love -- told Fuse TV.
Erlandson said Cobain was writing and producing songs that transcended his previous work.
"It would have been his White Album," he added, referring to the celebrated Beatles work.
"I was really excited about some of the stuff he was working on. I got to see him play it in front of me. That's why I was really sad [when he died]," Erlandson said.
Erlandson spoke with Fuse last week after publishing a book about his relationship with Cobain, entitled "Letters to Kurt."
An album of Cobain's rough demo recordings could still be released, he said.
"I've heard someone is compiling [songs]," Erlandson said, "I'm not in control of things. I just wish something would come together."
Cobain committed suicide at the age of 27, near the height of his grunge-rock band's success.