Úlfur's music is characterized by dense string arrangements and modal counterpoint.[4] Úlfur's music also incorporates microtonalism to a varying degree, with some of his works being written entirely for custom tuning arrangements. His piece for large orchestra Interwoven was written for all 38 independent string voices of the Iceland Symphony Orchestra. Weightlessness is another example of microtonalism in his work, which utilized 4096 custom tuned organ pipes in a church organ.[5]
Instrument design
Úlfur has designed a number of custom electronic instruments which he uses in his compositions.[6] In 2018 he revealed his Segulharpa, a 25 string electromagnetic harp that uses electromagnetic actuation circuitry to produce its tone. The instrument is either played by touching the capacitive metal sensor keys on the front panel, or programming the instrument using MIDI.
'Arborescence' was recorded and produced at the Figure Eight Recording studio in Brooklyn, NYC. The title track was originally written for Orchestre philharmonique de Radio France.
Orchestral piece written for microtonal string orchestra by commission from conductor Daníel Bjarnason, premiered by the Iceland Symphony Orchestra at the Dark Music Days Festival in 2017.[9]
Weightlessness (2016)
Music written for the Klais Orgelbau orchestral organ in the Hallgrímskirkja cathedral in Reykjavík, Iceland. The organ was previously prepared by the composer to allow for microtonal tuning of each individual pipe. Weightlessness was premiered at the Dark Music Days Festival in 2016, and later released as part of the composers solo album Arborescence in 2017.
Innstirni (2016)
Solo piano piece written by commission from Pianist Edda Erlendsdóttir. Premiered at the Dark Music Days Festival in 2016.
Interwoven (2015)
Orchestral piece written for microtonal string orchestra by commission from Israeli conductor Ilan Volkov, woodwinds and percussion. Premiered by the Iceland Symphony Orchestra at the Tectonics Festival in 2015.
Þýð (2014)
String trio written by commission from Icelandic Baroque music group 'Nordic Affect'. Premiered at The Museum of Water in Iceland, 2014.