Car horns, sirens, delivery trucks. ONstage is situated in a densely populated urban environment, bringing with it the ambient sounds of daily city life. Additionally, because of its stacked condition, the sound and noise from the support spaces and offices above present an additional challenge. At the end of the day, the most important design aspect of soundstages is the sound itself. To address all these concerns, stage walls are built with twelve-inch-thick solid grouted masonry walls. Their mass effectively blocks sound transmission over a wide range of frequencies. The stages are lined on walls and ceiling with thick acoustic boards and spray acoustic insulation to absorb sound and control any sound reflection and reverberation. All plumbing from the dressing and makeup rooms is sandwiched between two concrete slabs to avoid running any plumbing within the ceiling of the stages. The floors are finished with carpet and LVT, but underneath them is a continuous sound isolation pad that absorbs any footfall from being heard below.