In Close Call your smartphone is a musical instrument. And you are not just an audience member, but a musician in a crazy band with three drummers! Arthur Wagenaar is a Dutch composer and musician. He has a deep love for rock bands, theatre, opera and classical music, and his music is usually a mixture of all of this. He also loves to invent his own instruments, mechanical or electronic, such as the "rampaphone," a string instrument nine meters in length, the "kleurwerper," played by juggling, and of course the Close Call Live app. In this performance from Classical:NEXT! in Rotterdam, he is supported by Joep Hendrickx, Tjalling Schrik, Marijn Korff de Gidts, Boy van Ooijen, Dodó Kis, Sarah Jeffery, Lotte Pen, Matthias Konrad, and Axel Schappert.