Professionally filmed video footage of STONE SOUR's entire September 24 performance at the Rock In Rio festival in Rio De Janeiro, Brazil can be seen below. Former DREAM THEATER and AVENGED SEVENFOLD touring drummer Mike Portnoy sat behind the kit for the concert so that STONE SOUR's regular drummer, Roy Mayorga, could stay home to await the birth of his daughter, who was due to arrive on the same date.According to The Pulse Of Radio, STONE SOUR frontman Corey Taylor has told Artisan News that the band's next album may be a double-disc concept record. Taylor explained, "The thing I can say is that it's like little bits and pieces of the first three albums, but it's very dark. I've got a story . . . it's almost a concept album that I'm writing right now and it might turn into a double album. There's a lot of really good material that we're all kinda coming up with and I'm really excited to get in to the studio and see what happens." The follow-up to last year's "Audio Secrecy" may be out in 2012 a shorter gap than usual between STONE SOUR projects. Meanwhile, a STONE SOUR live DVD packaged with a covers EP is expected out before this Christmas. Taylor told The Pulse Of Radio why he and many musicians enjoying covering other artists' songs. "The thing I love about playing covers is that a) it's a chance to walk in the footsteps of your heroes," he said. "It's a chance to have fun. There's a certain amount of relaxation that comes when you don't have to worry about your song. This is someone else's song, you know. This is where you can relax and just remember why you're a music fan in the first place."