Mastodon have shared some details about their upcoming new album, calling it “the fullest, biggest-sounding record” they’ve ever done.The follow-up to 2017’s ‘Emperor Of Sand’ is currently being mixed with help from Grammy-winning producer/mixer/engineer David Bottrill, who is known for his work with the likes of Muse, Tool and many others.Speaking in a new interview with Talking Metal, Mastodon guitarist Bill Kelliher discussed the band’s eighth studio album and talked about what it was like working with Bottrill.“Honestly, I hadn’t really heard of him before last year,” Kelliher said of Bottrill. “We were kind of tossing around who we were gonna use for the new record.