A musician is a person who plays or writes music. Musicians can be classified by their roles in creating or performing music:
* An instrumentalist plays a musical instrument. * A singer (or vocalist) uses his/her voice as his/her instrument. * Composers, songwriters and arrangers create musical compositions, songs and arrangements. These may be transcribed in music notation, performed or recorded. * A conductor leads a musical ensemble. A conductor can simultaneously act as an instrumentalist in the ensemble. * A recording artist creates recorded music, such as CDs and MP3 files.