This comprehensive review of literature pertinent to the use of music in instructional films presents selected opinions, viewpoints, and hypotheses as an approach preliminary to experimentation. The need for research work in seeking principles which govern the operation of music to reinforce learning and the need to state such relationships as may be found quantitatively is particularly great because film producers need to have authentic guidelines for including particular amounts and kinds of music in instructional films. The functions and techniques of music in motion pictures and the functions of the film music composer are discussed. A selected bibliography on motion picture music is appended. (GO/MF)