A musical passage is a section of a piece of music that is repeated or used as a transition between sections. An INTRO is the beginning of a musical passage, usually consisting of a few bars of music. A PHRASE is a short section of music, usually 8-16 bars long. A CODA is a concluding section of a musical passage, often used to bring the piece to a close. An arioso is a type of musical passage that combines elements of both recitative and aria. A rondo is a type of musical form that consists of a recurring theme alternating with different sections. A STRAIN is a short section of music, usually 8-16 bars long, that is repeated several times. A stretta is a type of musical passage that is used to bring a piece to a close, often by repeating the main theme.