👉 Notches are a type of musical notation used to indicate the length or duration of different parts in a piece of music. They are often used to show how long each section of a piece should be played, and they can help listeners understand the structure of the piece more clearly. For example, if you were writing a piece for a symphony, you might use notches to indicate the length of each movement, which in turn would help you to determine the overall length and feel of the entire work
