Apart from singing and playing a variety of instruments in several bands, Herranen has also established himself as a record producer and sound engineer both in studio and live concerts. He has predominantly been involved with the production of heavy metal recordings and concerts of such bands as Lullacry, Carnalation, Profane Omen, Kilt, Plastic Tears, The Chant, Iiwanajulma, Misery Inc., and Killpretty. As a lead vocalist, Herranen has fronted many cover bands playing the music of Iron Maiden, Alice in Chains, Metallica, and Pantera.
