Music arrangement refers to the process of taking a piece of music and transforming it into a new, unique version that is tailored to a specific performance or recording. Arrangement involves making decisions about instrumentation, tempo, dynamics, and other elements of the composition and can range from simple changes to complex reimaginations of the original material. Arrangement is often used in genres such as jazz, where improvisation and interpretation of existing works are highly valued but can also be applied to any style of music.

A well-crafted arrangement can bring new life to a piece of music, highlighting different aspects of the composition and creating a fresh interpretation. Arrangers may choose to add or subtract instruments, change the key or time signature, or alter the melody or harmony to create a new mood or atmosphere. Arrangement is an important skill for composers, producers, and performers alike, as it allows them to tailor their music to specific contexts and audiences and to explore the creative possibilities of existing works. Whether it is a jazz standard or a contemporary pop hit, a well-executed arrangement can transform a piece of music into something truly special.