Kosheen DJs are a duo from the UK also know as Decoder & Substance and members of Bristol based Kosheen. The often do remixes for other artists.

The duo is made up of Decoder, the stagename of drum & bass and jungle producer Darren Beale. And his partner in crime Substance, the stagename for Markee Morrison aka Mark Davis. Both part of the Bristol based alternative dance / drum and bass / rock outfit called Kosheen fronted by vocalist / songwriter Sian Evans.