Ondes développe deux thèmes - le 1er, au début monodique, s'élabore progressivement pour atteindre la dimension polyphonie ' spectrale ' respectant la disposition harmonique naturelle acoustique, A l'inverse le 2nd, d'essence polyphonique, suite d'accords de 4 sons exposés en deux plans sonores mobiles, donne naissance à un développement linéaire contrapuntique, temporellement instable évoluant ' vers le chaos ,' La partie centrale est un mélange d'ondes stationnaires ou fuyantes alternant les deux thèmes que tout oppose : des accords rêveurs de 6 sons cette fois, laissent place à des envolées survoltées utilisant l'ambitus entier du grand marimba, Après une réexposition variée, la coda roule puis éclate, / Marimba

Accidental Flight was expertly composed in 2000 by Sadie Harrison. This piece was first performed by Simon Limbrick at the Warehouse London in November 2000.Australian bornfreelance composer and performer Sadie Harrison’s unique fusion of elements from indigenous Lithuanian music and poetry with her own modernist often abrasive style have led her to be compared with Bartok butwith her own warmth and grandeur. Since 2012 Harrison has been working along side a long list of well accomplished musicians; Paul Carey Peter Sheppard Skaerved Sergej Okrushko Alex South DuncanHoneybourne are among many who have had the privilege work with Harrison so far. Performances of Harrison's works have been given across the world by Lontano London Chamber Symphony MusicProjects/ London Ixion Okeanos Bournemouth Sinfonietta Kokoro and the St. Christopherus Chamber Orchestra and many others.