Education and early musical activity
Played piano from the age of six, and was soon eagerly improvising at the piano.
Master of Divinity 1965. In 1966 postgraduate studies in 19th century Norwegian church history. Musical activities alongside these studies included piano playing with Nicolai Dirdal at the Oslo Conservatory, choral singing, and some composing.
Studied music at Oslo University,1968-1969. Studied composition at the Norwegian Academy of Music, Oslo with from 1971, Diploma in 1974. The Academy studies also included viola playing and one-term courses in choral conducting, figured bass, and percussion and a short improvisation seminar by Cornelius Cardew. He also attended a private seminar on sonology and Mahler symphonies by
Shorter courses in studio work at NSEM, Høvikodden 1975/76, EMS, Stockholm 1983, , Oslo 2004.
His music has been performed and/or broadcast in several European countries, Japan and the USA. The choral work Two Psalms is the one that has achieved most performances internationally. Orchestras that have played his music include Oslo Philharmonic Orchestra, the symphony orchestras of Bergen and Trondheim, and the Norwegian National Youth Orchestra, Elverum.
Festivals that have programmed Mostad's music include the and Autunnale in Bergen, in Oslo, Stockholm and Helsinki, , Totnes, England. In 2010 he was featured composer in Ny Musikk Østfold's Festival.
In the years 1982-1985 he held the Norwegian State Scholarship for Artists. Other scholarships include Alv og Leslie Hurums minnefond, 1987 and Fegerstens stipend, 2004
Mostad’s musical style early emerged from a linear-expressionist style to more focus on sound and timbre, while still retaining a place for the melodic element.
From about 1975 the harmony is often related to the harmonic series, sometimes in a way that includes microtonal deviations from the tempered scale. Some works use modal or freer techniques that allow for juxtaposition or transition between a tempered 12-note harmony and one based on harmonic spectra.
Some works likeTowards Balance and The Light Shines in the Darkness, reveal a "reversed" development form, where the climax of tension and density of texture is reached shortly after the start, making the remaining part of the piece a long relaxation moving towards greater simplicity and clarity.. House, Two Sketches and a Landscape, the String Quartet No. 1 and other cyclical works display unfamiliar solutions to the relations between movements.
Output – spiritual basis
Mostad has composed chamber music, including solo works for piano, guitar, cello. doublebass, and organ, works for voice and instrument(-s), and electro-acoustic works. The core of his output, however, is orchestral and choral music. The full-length programme work Were You There, When They Crucified my Lord? The Story of Jesus’ Suffering, Death, and Resurrection according to St. Mark for mixed choir, narrator, vocal soloists and orchestra (including electronic soundtrack in one movement), combines these fields of interest.
The text of this work is about the very centre of Christian belief and worship: The death and resurrection of Jesus. This is also fundamental for Mostad's life as a Christian, including his composing.
From 1974 to July 2006 Mostad worked as a teacher in the secondary school system in his home town Fredrikstad and neighbouring Moss. Also before 1974 he periodically worked as a teacher.
He has held offices in The Norwegian Society of Composers, TONO (Norway's Performing Rights Society), and Ny musikk (The Norwegian branch of International Society for Contemporary Music.) On voluntary basis he is active in different kinds of Christian work
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