Normally, however, one calls a desire instrumental when one means it is merely instrumental when one means that the end is desired merely as a means to some other end, and not at all for its own sake instrumental desires are also sometimes called extrinsic. It was new, it was different. At this juncture the question isn t if they can master the intricacies of this landmark composition but whether or not the drummer either Dennis Chambers or Peter Erkskine can pull off Steve Gadd s incredulous, bar-setting performance preserved forevermore on the original LP. Р, Р Р Р Р” ,. THE STAPLES SINGERS 1951-.