Downloadable software to control and improve audio equipment sound quality; Electrical and electronic connectors; Electronic combiners for connecting antennas and receivers; Portable sound reproducing apparatus; Sound systems comprising remote controls, amplifiers, loudspeakers and components therefor; Cable connectors; Sound recording apparatus; Telephone connectors; Recorded computer operating system software; Sound equalizers and crossovers; Connection cables; Electrical connector housings; Electronic sound mixing, processing and synthesizing apparatus; Downloadable computer programs for editing images, sound, and video; Signal splitters for electronic apparatus; Sound recording and sound reproducing apparatus and instruments; Connectors for electronic circuits; Carrying cases, holders, protective cases and stands featuring power supply connectors, adaptors, speakers and battery charging devices, specially adapted for use with handheld digital electronic devices, namely, cell phones, tablets and electronic sound and image players.; Downloadable computer software for processing digital music files; Digital sound processors; Electric cables, wires, conductors and connection fittings therefor; Radio monitors for reproduction of sound and signals; Cables for the transmission of sounds and images; Downloadable software development kits (SDK); Sound transmitting apparatus; Downloadable computer software for creating and editing music and sounds; Playing devices for sound and image carriers; Sound and video recording and playback machines; Audio electronic components, namely, surround sound systems; Apparatus for recording, transmission and reproduction of sound; Apparatus for broadcasting, recording, transmission or reproduction of sound or images; Sound reproducing apparatus; Radio receivers for reproduction of sound and signals; Downloadable decoder software; Sound amplifiers; Sound and picture recording apparatus; High definition multimedia interface splitters; Downloadable mobile operating system software; Personal headphones for sound transmitting apparatuses; Electric connections and connectors; Downloadable computer software to control and improve computer and audio equipment sound quality; Sound projectors and amplifiers; Sound mixers with integrated amplifiers; Sound mixers; Computer hardware and recorded software for processing digital music files sold as a unit