I think the answer is <span>The 1844 Treatise on Modern Instrumentation and Orchestration. This handbook was created by Berlioz to introduce the aesthetic of the expressive music of the opera. The handbook was also used as a principle on how to create similar style of Bach and to the other romantic composers during their time</span>
Geometric shapes, such as circles ovals squares rectangles triangles hexagons and pentagons
