The crossword solutions for the term JAM CACOPHONY are 'HORNS'. HORNS are a type of wind instrument that produce sound by vibrating the player's lips against a mouthpiece. They are usually made of brass or other metal and come in many shapes and sizes. HORNS are often used in jazz, classical, and other types of music to create a loud, chaotic sound. The term 'jam cacophony' is often used to describe the sound of multiple HORNS playing together.