Marimba piece in A major

The task

Compose a marimba piece in A major, 116 BPM moderato, 4/4, about 80 bars and about three minutes, scored for marimba and bass in 2 voices. Texture: a sixteenth-note marimba ostinato. Open with 8 bars establishing the accompaniment before the melody enters on an upbeat. The main section runs on a 8-bar diatonic loop…