Arrangement (from the French - "tidy up", "hold") - arranged by a musical work for the fulfillment of his other, compared with the original instruments or voices. Performing at this composition can be extended (arr. D. M. Tsyganov some piano Preludes of Shostakovich violin and piano) or decreased (arr. N. Rimsky-Korsakov's orchestral "Kamarinskaya" Glinka Violin, viola, cello and piano).
Arrangement often leads to a certain simplification or complication of the musical texture of the original. However, we must distinguish between an arrangement of transcription. When transcription composer more freely and vorcheski suited to the processed product and, in essence, creates a separate essay.
In modern pop music under the new arrangement is meant treatment or already well-known tunes. This treatment vlyuchaet the following: harmonization (peregarmonizatsiyu) tunes, some modifications to its rhythmic pattern, creating extensive and rich musical textures, instrumentation. In practice, writing melodies and arrangements are often performed by different composers. Choral arrangement studied in music schools of the future of the choir conductors. They are able to leverage the expressive means of choral music while composing or processing of products for the choir.