Feeder and Taking Back Sunday are the latest bands to join the Sonisphere festival.They join Metallica, Linkin Park, Nine Inch Nails and Bullet For My Valentine at the two-day festival which takes place at Knebworth House on August 1 and 2. "It's great to playing at Sonisphere," Feeder frontman Grant Nicholas told Kerrang!. "I saw some great bands play at Knebworth when I was younger. It is an amazing venue and has hosted some of the most amazing shows over the years. It will be our only UK festival appearance this year as we are busy working on the next Feeder album - so we will be rocking as hard as ever." Also appearing at Sonisphere are Skindred and Frank Turner. To purchase tickets head on over to www.aloud.com.