sentences:  Working with a team of mathematicians, physicists, engineers, composers and musicians, Edelstein is developing his original ideas for new materials, techniques and approaches in spatial acoustics for theatre.His ideas of Acoustic Theatre include; a new system of control and notation of the acoustic space (The Acoustic Grid); entirely acoustic (non-electronic) techniques for a new system of composition; the creation a new kind of acoustic instrument (acousmonium); and the acoustic design of a new theatre.Edelstein's team are utilizing new materials based in the principal of sonic crystals to modulate the architecture of the acoustic space so as to add a new real-time parameter of control in a musical performance.