audio and video equipment, namely, amplifiers, audio mixers, audio equalizers, encoders, decoding apparatus, microphones, microphone arrays; gain and noise control units, namely, electronic and microprocessor controllers for audio equipment; networked digital signal processing system consisting of computer hardware and software used to capture, condition, and transmit audio and video signals; software and computer hardware for controlling, managing and monitoring room lights, audio, video, and the room environment, namely, window coverings, projection screens, and ambient room temperature; analog and digital equipment used to capture, amplify, modify, combine, process and transport audio and video signals, namely, amplifiers, digital audio signal processors being microprocessors, audio mixers, encoders, decoding apparatus, microphones; network based paging and background music system with life safety and mission critical paging capabilities, comprising computer hardware and operating software therefore