Morceau Subrosa (also known, in full, as SUPPLEMENTO {BT: Volume 01.

NUOVO MORCEAU SUBROSA {A topological ABSTRACT of Granular Systems} [Symphonie elektronik]) is the eighth studio album by composer and electronica artist BT, and was released on June 19, 2012, in tandem with If the Stars are Eternal So are You and I, his seventh studio album.

First announced in March 2012, BT described Morceau Subrosa as "unlike any other album I have released.

[citation needed] Morceau Subrosa is very different in style compared to most of BT's previous works, exclusively favoring ambient soundscapes.

Certain aspects of the album were previously used in These Hopeful Machines, such as ambient intros.