OFFICIAL SITE: www.dubkasm.com. Dubkasm is a UK and Brazil-based roots reggae/dub outfit from Bristol, England. Formed in 1994 by Digistep (producer and musician) and DJ Stryda (co-ordinator/promoter), their debut release in 1996 was 'Chemical Reaction Dub' on Nubian Records' 'Dub Out West' compilation series (NRLP15). Since then they have released seven records on their own Sufferah's Choice Recordings label (named after DJ Stryda's well-established Bristol radio show) and received consistent radio and soundsystem play.