Arborescences is a stereo acousmatic composition. The sound material derives from particular resonances and timbres produced by striking, rubbing and scraping an assortment of Gamelan instruments. Most of the sonic images in the piece are not recognisable as instrumental sounds because of the extended processing, which focuses on developing particular gestures and textures based on micro elements and groups of partials extracted from the recorded events.
The composition explores temporal syntax based on my research on timescales. Timescales at various points in the piece move at different pace, so that arborescent temporal structures move apart and then meet again. Periodicities turn into erratic behaviour and the opposite, undergoing a number of processes of change at the same time.
The image on the right shows arborescent temporal structures in the composition. Arborescences grow from one source-stream, and gradually disappear or transform into a different kind of organisation. The thickness of arborescences indicates spectromorphological complexity of streams that constitute corresponding timescales. Part of the sound undergoes a rhythmic development (dark areas), while another part demonstrates a more fluid, non-discrete motion (light grey areas).
The image on the left shows an example of swelling of dynamics in a section of Arborescences, which create a metastructure in the lower-order organisation of timescales.
Arborescences received a special mention in the Métamorphoses 2008 international acousmatic composition competition, and was presented in various concerts, conferences and festivals around the world, including SMC in Portugal, ICMC in Canada, the Sonoimágenes festival in Argentina, the Sonic Rain concert series in Oregon USA, the international exhibition at the Byte Gallery in Lexington USA, and the ISCM World New Music Days festival in Sydney, Australia.
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