Sentence:  The distribution of instruments is fairly traditional, but with piccolo trumpet and bass trombone to explore extremes, and bells, gongs and tam-tams to variegate the sound. Such <WSD>exoticisms</WSD> as the xylorimba (Richard Fitz) and glockenspiel (Jeffrey Milarsky) are introduced along with the sounds of shifting sand. 
Meaning of the word marked with <WSD> tags:  Something exotic.