Venn Diagram was composed with special attention to related items in sets of three. The piece features three groups of three performers in three percussion instrument categories: metal, wooden, and non-pitched. The piece is set in 9/8 time, with three different divisions of the measure: 3+3+3, 3+2+2+2, and 2+2+2+3. There are also three symmetrical scales utilized – octatonic, whole tone, and a synthetic scale with half-steps on either side of the midpoint pitch – and each scale is partnered with one of the three metric divisions.
Venn Diagram is a pseudo-minimalistic work with numerous subtleties in phrasing and ensemble orchestration. Dynamics must be carefully observed. Monotone yarn or chord mallets are preferred for use on both vibraphone and marimba to create consistency of articulation at all dynamic levels. Medium-hard plastic mallets should be used for glockenspiel and hard-rubber or polyball mallets for xylophone. Both traditional chime mallets and triangle beaters are indicated for use in the chime part. All non-pitched percussion parts are to be played with hands only.
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