acappella are DJ tools, theres mellodies with little percussion or bassline which can be consieved as DJ tools. i've heard all of these used effectively to layer an otherwise 1 dimentional track live.

its not the tools that are 'killing' techno, its the lack of imagination behind the people who use the tools.

its the DJs job to weed out the interesting tracks from the naff or monotonous records and to play them in an interesting way. if people are complaining that the music being released is substandard, then they should stop buying it and DJs should stop playing them.