Complexity

Complexity

Classical works often display musical complexity through the composer's use of development, modulation (changing of keys), variation rather than exact repetition, musical phrases that are not of even length, counterpoint, polyphony and sophisticated harmony. Larger-scale classical works (such as symphonies, concertos, operas and oratorios) are built up from a hierarchy of smaller units: namely phrases, periods, sections, and movements. Musical analysis often seeks to distinguish and explain these structural levels.