It's not just Deep Purple's induction into the Rock and Roll Hall of Fame next month that their fans are anticipating. Today (March 11), bassist Roger Glover gave an update on the progress of their new record.

"We started the next album in Nashville on the 28th January," he wrote on the band's Facebook page. "Thirteen days of pre-production and thirteen days recording in the studio. Lucky thirteen because we have thirteen tracks, all but finished except for vocals."

The synchronicity of the numbers wasn't lost on Glover, who continued, "Coincidence or what? How many will end up on the album is hard to tell yet ... maybe all of them, maybe not. I won’t even begin to describe the music – an impossible job in any case. Suffice to say I’ve been listening to the rough mixes and there’s a smile on my face."

As with their last effort, 2013's NOW What?!, their new effort will be produced by Bob Ezrin – whom, along with his team, Glover added "did their usual superb job. The next stage will be [Ian Gillan] and I spending a week together, honing up on the lyrics before recording vocals in Toronto in April."

It wasn't been all work and no play for Deep Purple in Nashville, however. Glover said that he and keyboardist Don Airey saw Diana Ross with the Nashville Symphony one night, and hung out with Rival Sons, the band opening up for Black Sabbath on their current tour, on another.

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