Musical Section is a term used to describe the different parts of a musical composition. An Arioso is a type of lyrical melody, usually in a slow tempo, that is often used as a bridge between two sections of a piece. Strings are a group of instruments that produce sound by vibrating strings, such as violins, cellos, and guitars. A CODA is a passage at the end of a piece of music that serves as a conclusion or summation of the entire composition.