In tonal Western classical music (music with a tonic key or "home key"), the most frequently encountered chords are triads, so called because they consist of three distinct notes: the root note, and intervals of a third and a fifth above the root note. ... A series of chords is called a chord progression
This step would be, how do YOU interpret the art piece? Included in this step would be your personal opinion on the interpretation of it.
Trumpets and Drums. Mostly Percussion and Brass instruments were used.