Petter Karlsson is a multi instrumentalist who plays drums, guitar and sings. He drums in Distorted Wonderland, and Diablo Swing Orchestra. Petter joined the latter band in January 2010, replacing their old drummer, Andreas Halvardsson, who left due to "personal reasons".
Petter Karlsson was also member of Holocoaster, Therion, Argento, Master Massive, Kajarr, and Conspiracy.