Harmony of the Spheres is a concert programme based on cosmology during the renaissance. Historic philosophical and astronomical concepts from ancient Greece until the modern age are accessed through the music of the 16th and 20th century. The five musicians play on violas da gamba of several sizes, but also employ the potential of electronics and digital signal processing to craft musical concepts in space. Low-delay real-time spatial processing is applied to the instruments and presented via a multi-channel speaker setup. The composers range from Christopher Tye and the almost unknown Picforth via Johann Sebastian Bach to Steve Reich, John Cage and Karlheinz Stockhausen.
For an optimal perception of the spatial effects in the programme Harmony of the Spheres an unconventional arrangement of musicians and audience is used: The musicians play on the edges of a large regular pentagon. Within this pentagon is a 3rd oder Ambisonics system built from ten loudspeakers on a decagon. Within this circle sits the audience. Due to the isotropic nature of the arrangement of musicians and loudspeakers there is no distinct direction of the audience.