For once be all ears when strolling through Bielefeld University: students, teaching staff, other staff and guest artists transform the building into a musical artwork of sound by the means of music, sound and language. The architecture is performed in diverse ways by vanguard and experimental acts. Where more or less “matter-of-fact” science is taught during the day “peculiar” characters are walking abroad now. Whether singing in the canteen kitchen, sound improvisation or new melodies in the swimming pool … the university turns into a musical experience for this night. The so-called “red line” guides the audience crisscross through the university building, even into the most remote corner.