Sentence:  In his symphony, the form of the notes is the form of the moment, and the form of the moment is strings (lustre), horn (sheen), oboe (edge), harp (light) and glockenspiel (a touch of the <WSD>rinky-dink</WSD>). 
Meaning of the word marked with <WSD> tags:  A tinkling, tinny style of music; honky-tonk.