Career
One of the major inspirations for his music is astronomy. Based on the trajectories of the planets in the solar system, he created the "planetal scale", a mode consisting of the pitches C#, Doctorate, F#, G#, and A. Later, he discovered to his surprise that this was exactly the same as the Japanese Kumayoshi mode, which is also known as the Japanese pentatonic scale. Sisask is a Roman Catholic, and much of what he composes is sacred music