Audio apparatus and electronic equipment for converting signals and formats, namely, digital signal processors; digital signal processors to provide digital audio signal manipulation for use with musical instruments; sound amplifiers; switch control units, namely, electronic proximity sensors and switches; analog to digital converters; digital to analog converters; microphone preamplifiers; downloadable digital audio files featuring music and artistic performances; computer hardware and downloadable software programs for audio recording, playback, processing and mixing; electronic audio modifiers; signal processors; microphones; electronic tone modules; power controllers; guitar effects processors; amplifiers and audio sound speakers; computer hardware for recording, modeling, reproducing, and transmitting sound; digital interfaces for recording, modeling, reproducing, and transmitting sound; amplifiers for musical instruments and parts for use in connection therewith; amplifiers accessories for musical instruments, music; electronic audio processors for the audio signal manipulation of real or virtual musical instruments; electronic sound amplifiers; electrical apparatus for use with guitars and other purposes, namely, loudspeakers and loudspeaker components and accessories in the nature of electric cords, connectors, cables, and switches; electronic amplifier controls for volume, tone and effects