Mat Sinner is a bassist, vocalist, and record producer from Stuttgart, Germany.His main bands have been Sinner since 1982 and Primal Fear since 1997; he formed the latter band with Ralf Scheepers. But Sinner has been involved in numerous other projects throughout his musical career. He joined Voodoo Circle permanently in 2008 and worked recently as a record producer for Kiske/Somerville, Bobby Kimball/Jimi Jamison (Toto/Survivor), and the first Ralf Scheepers solo album.