This disc offers two very similar yet dissimilar pieces. Mausoleum is a piece akin to Andriessen's De Materie, De Staat etc. A broad 30 minute piece with use of his traditional ensemble. This piece is very aggressive, and the use of the two high baritones is really interesting. He uses voices as an instrument better than anyone I know. The piece frequently uses one of Andriessen's most unique techniques: Hocket. Which is the subject of Hocketus, which while not quite as musically attractive as Mausoleum, offers a view into master hocket technique, both compostionally and the way it is performed. For anyone into Andriessen, I'd be hard pressed to give you a reason not to buy this disc.