The Auditorium is a fluid project made of soft volumes, sinuous lines chasing each other and drawing a great organic sculpture which expresses the spreading of sound waves. A parallel project: architecture and sound, releasing a sequence of shapes, volumes, views: the focal point is the central stage where attention is immediately centred on the lower level of the hall. The space where sound is formed is a magnetic nucleus for the audience, that is "wrapped round" the musicians, drawing attention to the musical event and making its image fully central. The architecture has been created to exicite emotions, but the acoustics, studied by the acoustics engineer Yasuhisa Toyota, also become a strong point of the hall. The architecture tries to "capture" sound to translate it into an image; music, ephemeral in a timeless dialogue in the space celebrating string instruments. Fluidity and organicity of the architectonic spaces, living and pulsating with the regular and sterile definition of the rectangular hall which contains the Auditorium, like a box opening up its surprises. A basic idea: to build along parallel lines an identity between sound and architecture, in spaces that seems to crystallize sound waves.