GEEZER BUTLER Says A.I. Is Helping Him Finish New Solo Music

Legendary Black Sabbath bassist Geezer Butler has revealed that he has a significant amount of unreleased solo material — and modern technology is helping him finally bring it to life.

During a question-and-answer session at the 2025 Steel City Con, Butler was asked whether he still has any solo albums “in the tank.” His response made it clear that retirement from writing music is far from his mind. Which also appears to be the case for Butler‘s Black Sabbath bandmate, Tony Iommi.

“Oh, gosh. I’ve got tons of stuff,” Butler said. “Since we finished the last Sabbath show [at Back To The Beginning in July 2025], I’ve just been going through all the stuff that I’ve written since the ’80s onwards and updating everything.”

One of the biggest obstacles Butler previously faced was the lack of a vocalist during the writing process. That, he explained, has changed with the emergence of artificial intelligence.

“What held me back before, I didn’t have a singer when I’m at home, but A.I. came along,” he said with a laugh. “So all my songs now, I’ve updated them all and I’m using an A.I. singer to bring all the lyrics out.”

Butler clarified that the technology isn’t replacing human musicians, but rather helping him communicate his ideas more clearly. By using A.I.-generated vocals, he can now present fully realized song concepts to singers he plans to collaborate with.

“So now I can take it to singers that I’m gonna be working with and go, ‘This is what I want on the album,'” he explained. “Before I was just playing them a bass riff or something and going, ‘Can you sing to this?’… It’s so much better now, ’cause you can sit in your studio and do everything on A.I. and then take it to proper musicians and let them take over.”

Butler acknowledged that some fans view the use of A.I. as controversial. “A lot of people think it’s cheating,” he said, though he emphasized that it has been a creative tool rather than a shortcut.

During the session, Butler also reflected on Black Sabbath‘s classic songwriting process, highlighting how organic and collaborative it was.

“With Sabbath, we’d sit down in a room together and just jam and jam and jam until somebody came up with something that we could work with,” he said. “Once we had a good riff, we’d finish the music part of it. Ozzy would sing his vocal line, then I’d write the lyrics.”