In the residency series Extratool, Extrapool will hand over its sound studio to a musician or (sound) artist for a few days. This person then invites a colleague to collaborate on two new compositions. At the centre of this series is Yuri Landman's range of instruments: string and percussion instruments on which coloured dots indicate harmonic divisions that deepen and colour the various sounds. From the 14th till the 17th of May 2020 SOON was the first one to accept this invitation.