The high sonic quality of the classical amphitheatres provided the basic acoustic principles of contemporary auditoriums. As technology improves, certain acoustic design principles are augmented. For example, the geometry of the stepped stalls can now be retracted and lifted using air castor technology.
Finishes specification involves detailing a list of all the materials in the final parts of the project. The file contains commercial products available in the market following technical, functional, aesthetic, and economic criteria ‒ price and maintenance costs.