Nouns

(n)instrumentality, instrumentation, meansan artifact (that is instrumental in accomplishing some end) for accomplishing some end
(n)instrumentationthe act of providing or using the instruments needed for some implementation
(n)instrumentationthe instruments called for in a musical score or arrangement for a band or orchestra
(n)orchestration, instrumentationthe act of arranging a piece of music for an orchestra and assigning parts to the different musical instruments