Today, his most performed piece is an etude in the unusual key of D-sharp minor.
Vladimir Sofronitsky, who married this composer's daughter, was considered his definitive early interpreter. He often used transpositions of a chord consisting of C, F sharp, B flat, E, A, and D. This composer switched to a single movement format for piano sonatas after his fifth, such as in two pieces using up to three or four musical staves. Today, his most performed piece is an etude in the unusual key of D-sharp minor. This composer used a "color organ" and popularized the "mystic chord" in a symphonic poem, and he envisioned a piece of performance art that would run for a week in the Himalayas before the end of the world. For 10 points, name this Russian composer of Mysterium and Prometheus: The Poem of Fire, a crazy synesthete.
Vladimir Sofronitsky, who married this composer's daughter, was considered his definitive early interpreter.
Alexander Nikolayevich Scriabin