Electroacoustic

All electroacoustic music is made with electronic technology. Many works in the field are concerned with those aspects of sonic design that remain inaccessible to either traditional or electronic musical instruments played live. Some electroacoustic compositions make use of sounds not available to typical acoustic instruments, such as those used in a traditional orchestra. These sounds sources may be prerecorded sounds, transformed sound recordings, or synthesized timbres. Some electroacoustic music places less emphasis on the “traditional” concerns of score-based music — rhythm, metre, harmony, and melody — and instead tends to explore the interplay of gesture and texture. This interaction between sounds and the ways they are transfigured over time has been termed "spectromorphology" by the composer Denis Smalley (Smalley 1997). Electroacoustic compositions can also utilise the manipulation of sound in space, using various loudspeaker based spatialisation techniques

Source : http://en.wikipedia.org/wiki/Electroacoustic_music