In 2011 Schaerer and ARTE performed for the first time at the Alpentöne Festival in Altdorf, Switzerland, playing a piece composed by Kaspar Ewald. Andreas took this opportunity to suggest to the ARTE guys a collaboration. Picking up the offer, they commissioned Andreas to write a composition and, Perpetual Delirium' was born. It's a work that is a harmonic, complimentary and inspiring musical fusion of the sound of the ARTE Quartett and Andreas Schaerer's voice. Since their inception in 1995, ARTE Quartett have reached a unique position with the travelling between the worlds of contemporary classical music, free improvisation and jazz. The four have kept fathoming stylistic borderlands and worked closely with a rich mix of composing performers such as Urs Leimgruber, Terry Riley, Michael Riessler, Lucas Niggli, Tim Berne, Fred Frith and Pierre Favre. Now Andreas Schaerer, singer, composer, bandleader and co-founder of the Berner Jazzwerkstatt follows this impressive line of musicians. Using the term, singer' in Andreas' case is an understatement. Really he is a vocal acrobat who enriches the international jazz scene with his daring feats. Coloraturas, crooner singing, wild scats, rap, and colourful sound painting - there is nothing he won't try to master or include in his repertoire In the project, Perpetual Delirium', Andreas focuses his attention on, classical' composition and sound, as well as, issues around intonation. For almost a year, he studied the characteristics of the individual playing style of the four musicians and their saxophones. As a result he managed to integrate the wide range of his inimitable vocalising with the equally colourful spectrum of the saxophones.