““Speaking generally, there are two kinds of descriptive music. The first comes under the heading of literal description. A composer wishes to recreate the sound of bells in the night. He therefore writes certain chords, for orchestra or piano or whatever medium he is using, which actually sound like bells in the night. Something real is being imitated realistically. A famous example of that kind of description in music is the passage in one of Strauss’s tone poems where he imitates the bleating of sheep. The music has no other raison d’être than mere imitation at that point. The other type of descriptive music is less literal and more poetic. No attempt is made to describe a particular scene or event; nevertheless some outward circumstance arouses certain emotions in the composer which he wishes to communicate to the listener. It may be clouds or the sea or a country fair or an airplane. But the point is that instead of literal imitation, one gets a musicopoetic transcription of the phenomenon as reflected in the composer’s mind. That constitutes a higher form of program music. The bleating of sheep will always sound like the bleating of sheep, but a cloud portrayed in music allows the imagination more freedom. One principle must be kept firmly””
