Publisher: Publishing is the process of production and dissemination of literature, music, or information — the activity of making information available to the general public. In some cases, authors may be their own publishers, meaning: originators and developers of content also provide media to deliver and display the content for the same. Also, the word publisher can refer to the individual who leads a publishing company or imprint or to a person who owns a magazine.
Arranger: An arrangement is the adaptation of a previously written musical composition for presentation. It may differ from the original form by reharmonization, paraphrasing or development of the melodic, harmonic, and rhythmic structure.[1] Orchestration differs in that it is only adapting music for an orchestra or musical ensemble while arranging "involves adding compositional techniques, such as new thematic material for introductions, transitions, or modulations, and endings...Arranging is the art of giving an existing melody musical variety".[1]
Compser: A composer (Latin com+ponere, literally "one who puts together") is a person who creates music, either by musical notation or oral tradition, for interpretation and performance, or through direct manipulation of sonic material as electroacoustic music.
Vocalist: Singing is the act of producing musical sounds with the voice, and augments regular speech by the use of both tonality and rhythm. One who sings is called a singer or vocalist. Singers perform music (arias, recitatives, songs, etc.) that can be sung either with or without accompaniment by musical instruments. Singing is often done in a group of other musicians, such as in a choir of singers with different voice ranges, or in an ensemble with instrumentalists, such as a rock group or baroque ensemble.
Lyrics: Lyrics (in singular form lyric) are a set of words that make up a song, usually consisting of verses and choruses. The writer of lyrics is a lyricist or lyrist. The meaning of lyrics can either be explicit or implicit. Some lyrics are abstract, almost unintelligible, and, in such cases, their explication emphasizes form, articulation, meter, and symmetry of expression. The lyricist of traditional musical forms such as Opera is known as a librettist.