As the band is warming up to hit the studio earlier next year, Testament frontman Chuck Billy discussed what the new record might sound like, stressing that the five-piece is still going for the unpredictable approach. "I never know until Eric Peterson throws a riff at me," Billy told Metal Obsession. "He keeps me on my toes, and we never do the same record twice, so I don't know yet. If he writes something that sounds like the 'Demonic' album, then I'll probably go with the death metal vocals. With that being said, I usually go with what he writes and what sort of vocals would suit it. I would definitely like to mix it up though." Chuck also touched on the subject of next year's Soundwave festival Testament is scheduled to perform at. Asked on which band he'd like to share the stage with, Chuck gave a fairly unexpected answer - Primus. "I haven’t seen the full festival lineup yet, but I noticed that Green Day are headlining. I've never seen them before, so it would be nice to see them live. I also heard that Primus are coming over to Australia in February and March, so I'm hoping that they'll be announced for Soundwave. It's going to be with their original drummer Tim as well, so I'd love to see him back in the band again. I'm not sure if it's an announcement coming up, or if they've actually been announced." The band's latest live effort, "Dark Roots of Thrash," saw its release on October 15 through Nuclear Blast Records. Check out the opening track "Rise Up" below.