The exhibit „Mondrian Evolution“ at the Beyeler Foundation in 2022 showed an exemplary set of three paintings of a single tree, made within two years. The earliest (Evening, Red Tree, 1910) is in a figurative, expressionistic style, colorful in its details. The second, a year later, is an abstract, wiggely black and red line drawing on a bluish background (Grey Tree, 1911). The third follows as a greyish rendering with short, bent lines (Apple Tree, 2012) of apparently the same tree. This fascinating, rapid transition from „Realism“ to abstract perceptions of a single object led me to create this Audio Quatroscopy, although with added colors to the two gray originals. A few years later Mondrian‘s paintings evolved into his best known designs of numerous red, blue, yellow and white rectangular blocks, separated by straight black lines. My graphic sequence evolves to the tune of Edvard Grieg's Peer Gynt Suite No. 1, Op. 46-I, "Morning Mood".