likely to represent the note C. The number system is commonly used to indicate the fingerings for specific notes on the recorder. Each finger or combination of fingers is assigned a number, starting from 1 for the index finger of the left hand, 2 for the middle finger of the left hand, and so on. The number 4 usually represents the fourth finger of the left hand, which is used to cover the fourth hole from the top on the recorder, producing the note C.
