Apparatus for recording, transmission or reproduction of sound or images; data processing equipment and computers; audio receivers, audio amplifiers, loudspeakers, radio receivers; radio transmitters; software programs for audio and video devices, software programs for managing audio and video data, software programs for editing audio and video data; software for processing images, graphic illustrations, audio content, video content and texts; audio editing software; software for controlling the operation of audio and video devices; software to control and improve audio equipment sound quality; software to enhance the audiovisual capabilities of multimedia applications, namely, for the integration of text, audio, graphics, still images and moving pictures; application software for streaming audiovisual media content via the Internet; software to enhance the audiovisual capabilities of multimedia applications; audiovisual apparatus; audiovisual instruments, digital audio servers; audio devices and radio receivers; sound processors; video processors; image processors; digital sound processors; processors [central processing units]; signal processors for audio speakers; sound processing apparatus; central processing units for processing information, data, sounds or images; audio apparatus; data processors; digital audio recorders; data loggers and recorders; digital video recorders; analog-to-digital converter, microphones; preamplifiers; sound amplifiers; amplifiers; apparatus for recording, transmission or reproduction of sound; data processing equipment and computers