Design and development of software and hardware for transmission of sound; design and development of software and hardware for signal amplification and signal transmission; design and development of software and operating system software for accessing and using a cloud computing network; design and development of software for audio and video operators; design and development of software for digital signal processing; design and development of software for processing and distribution of multimedia content; design and development of software for compression and decompression of multimedia content; software as a service [SaaS]; software as a service [SaaS] for sound devices, multimedia devices, audio/visual devices, audiovisual apparatus, audio devices, audio receivers and audiovisual receivers and headphones; platform as a service [PaaS] featuring software platforms for transmission of images, audio-visual content, video content and messages