In this documentary and field observation study, I visit the Elbphilharmonie in Hamburg, designed by Herzog & de Meuron with acoustics by Yasuhisa Toyota, to see how architecture and acoustics work as one system. On site, I look at the vineyard-style Grand Hall, where the audience surrounds the stage, and its sculpted "White Skin" of around 10,000 individually shaped gypsum fibre panels that diffuse sound across the room. I also look at the structurally isolated box-in-box construction that keeps out harbour and city noise, and at how structure, services and audiovisual systems are coordinated to create a seamless audience experience. Seeing the building in person shows what drawings and publications can't: how these decisions are actually experienced as sound, light and space. I share this study for architects, acoustic and AV consultants, engineers and developers, because it shows why performance spaces succeed when every discipline works toward the same sensory goal from the start.