thumb|right|Sisask in 2011
thumb|right|Estonian TV Girls' Choir with Urmas Sisask at St Paul's cathedral in London, 2008.
Urmas Sisask (9 September 1960 – 17 December 2022) was an Estonian composer.
Biography
Sisask was born in Rapla on 9 September 1960. One of the major inspirations for his music was astronomy. Based on the trajectories of the planets in the Solar System, he created the "planetal scale", a mode consisting of the pitches C#, D, F#, G#, and A. Later, he discovered to his surprise that this was exactly the same as the Japanese Kumajoshi mode, which is also known as the Japanese pentatonic scale.
Discography
- Starry Sky Cycle (Estonian: "Tähistaeva tsükkel") (1980–1987)
- Gloria Patri (1988)
- Pleiads ("Plejaadid") (1989)
- Milky Way ("Linnutee galaktika") (1990)
- Andromeda ("Andromeda galaktika") (1991)
- Benedictio (for mixed chorus) (1991)
- Christmas oratorio ("Jõuluoratoorium") (1992)
- Magnificat
- Missa Nr. 1
- Symbiotic Symphony ("Sümbiootiline Sümfoonia")
- Comet Hyakutake
- Ave Sol
- Missa Nr. 4 op. 46: Christmas mass ("Jõulumissa")
- Polaris ("Põhjanael")
- Veni Sancte Spiritus