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 software programs for audio recording, playback, processing and mixing; electronic audio modifiers; signal processors; user interfaces for electronic devices; microphones; 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 and accessories for use in connection therewith; computer software, namely, audio modification software, audio recording software, audio modeling software, and audio editing software; computer software to generate and control musical tones from microphones and musical instruments; computer software for accessing prerecorded music; computer software for use in downloading, uploading, accessing, recording, editing, storing, and playing music, tones and sounds and for providing access to websites containing libraries of music, tones and sounds; downloadable audio recordings featuring music and artistic performances; audio processors for the audio signal manipulation of real or virtual musical instruments; sound amplifiers; electrical apparatus for use with guitars and other purposes, namely, loudspeakers and loudspeaker components and accessories, namely, electric cords, connectors, cables and switches; amplifier controls for volume, tone and effects