Composer

作曲者 (Composer) is a person who creates the melody, harmony, rhythm, structure, or other musical elements of a musical work. Composition results in a musical work that can be performed and recorded multiple times; a specific recording is one sonic realization of that work. The two are distinct entities in terms of copyright, identification, and credit.

Composition can be accomplished through sheet music, improvisation, oral dictation, digital audio workstations, or group rehearsals. In classical music, complete works are typically attributed to a single composer, whereas in popular music, works may be co-written by multiple people, with credits such as “songwriter,” “composer,” or “composer-lyricist” used. The proportion of contributions and the order of attribution are determined by agreements and local rights systems and cannot be directly inferred from the order of names. The distinction between “Composer” and “Arranger” depends on the extent of new creative input. An arranger assigns instruments, parts, and sections to an existing work, while 作曲者 creates the work’s foundational musical material; substantial rewriting may result in credits for both composition and arrangement. Sampling, interpolation, and adaptation may also involve the authors of the original works, so the final credits do not reflect only the participants in the current recording session.

A 作曲者 may simultaneously be a performer, producer, and principal artist, or may not participate in the recording at all. The “written by” credit on a record sleeve sometimes combines the composer and lyricist; if a database is to distinguish between these roles, it requires more detailed publishing or copyright information.

Systems such as ISWC are used to identify musical works, while ISRC is used to identify recordings. When a song is covered, a new ISRC is typically generated, while the original 作曲者 credits and work relationships are retained.