Who is an 'author' under the provisions of the Copyright Act, 1957 for musical and other classes of work?

Author under the provisions of the Copyright Act, 1957 in relation to a musical work is the composer. 'Composer', in relation to a musical work, means the person who composes the music regardless of whether he records it in any form of graphical notation. Author under the provisions of the Copyright Act, 1957 other class of the work as under: in relation to a literary or dramatic work, the author of the work; in relation to an artistic work other than a photograph, the artist; in relation to a photograph, the person taking the photograph; in relation to a cinematograph or sound recording the producer; and in relation to computer generated, the person who causes the work to be created.