Musical instruction is a term used to describe the instructions given to musicians in order to perform a piece of music. It includes directions such as ADUE (4 letters), which stands for 'a due' and is an Italian phrase meaning 'in two, ' indicating that a passage should be played in two beats per measure. FORTE (5 letters) is a dynamic marking meaning 'LOUD, ' and REST (4 letters) is a notation indicating a pause in the music.