Definition of "disseminator"

I think that the New Song movement may hold the key in the cultural merging of many cultures and peoples, for it expands the role of the artists into a disseminator of artistic culture, instead of the self-absorbed, individualistic style that characterizes North American songwriters.

1984 April 21, Maida Tilchen, “New Song, New Feminism, New Gay Awareness”, in Gay Community News, page 16