Preview. These etudes focus on the following five issues on the timpani: Sound Quality, Articulation (and evenness between the hands), Rolls, Intonation, Rhythm and Time. A tutorial & demonstration follows the perf Studies in Copper. Alex OrfalyC Alan McClaren Productions. Publisher Desc. These etudes focus on the following five issues on the timpani: Sound Quality, Articulation (and evenness between the hands), Rolls, Intonation, Rhythm and Time Studies in Copper (Orchestral Etudes forTimpani)A