I just came across these striking 30s artwork by music theorist Joseph Schillinger (1895–1943), one of the first composers for theremin. They were inspired by his interpretation of the mathematical basis of the arts, and are now housed at the Smithsonian American Art Museum and the Renwick Gallery. Wouldn't they make amazing album covers?
Joseph Schillinger, Area Broken by Perpendiculars, ca. 1934, opaque watercolor, Smithsonian American Art Museum, Gift of Mrs. Joseph Schillinger, 1966.39.5
Joseph Schillinger, Key Blue (from series, the Mathematical Basis of the Arts), ca. 1934, tempera on paper, Smithsonian American Art Museum, Gift of Mrs. Joseph Schillinger, 1966.39.3
Joseph Schillinger, Green Squares (from series, the Mathematical Basis of the Arts), ca. 1934, tempera on paperboard, Smithsonian American Art Museum, Gift of Mrs. Joseph Schillinger, 1966.39.2