A Music Orchestrator takes a composer's musical ideas and arranges them for an orchestra or ensemble, ensuring the music is playable and effective for live performance or recording. They decide how instruments should be assigned melodies, harmonies, and textures to achieve the desired sound. Orchestrators often work in film, television, theater, and concert music, collaborating closely with composers, conductors, and musicians. Their expertise in instrumentation, harmony, and notation helps bring compositions to life with clarity and emotional impact.