Contemporary classical music can be understood as belonging to the period that started in the mid-1970s to early 1990s, which includes modernist, postmodern, neoromantic, and pluralist music. However, the term may also be employed in a broader sense to refer to all post-1945 musical forms.
Generally "contemporary classical music" includes modern forms of art music such as post-tonal music after the death of Anton Webern,
including serial music, electroacoustic music, musique concrète, experimental music, atonal music, minimalist music, etc; and post-1975 music such as Spectral music, post-minimalism, sound art, etc.
Notable composers include Philip Glass, John Adams, Steve Reich, Thomas Adès, Olivier Messiaen, Pierre Boulez, Arvo Pärt, Terry Riley and Charles Ives.