Harmonics refer to the frequencies of sound that are whole number multiples of a fundamental frequency. When a musical instrument, like a guitar or a piano, produces a note, it generates not just the main frequency but also additional frequencies that contribute to the overall sound. These additional frequencies are called harmonics, and they help define the timbre or quality of the sound. In music, harmonics play a crucial role in creating rich and complex tones. For example, when a violin is played, the harmonics blend with the fundamental note, resulting in a fuller sound. Understanding harmonics is essential for musicians and sound engineers to manipulate and enhance audio in various contexts.