Z-TONE

variable impedance-adapting circuit sold as a component of apparatus for the recording, transmission, amplification and reproduction of sound; Audio interfaces; sound cards; audio circuit boards; interface cards for computers; sound mixers with integrated amplifiers; audio mixers; audio recorders; sound recording apparatus; sound recording equipment; sound recording and reproducing apparatus; apparatus for the recording, transmission, amplification and reproduction of sound; converters, electric; Downloadable USB (universal serial bus) operating software; USB (universal serial bus) hardware; microphone audio mixers; software for creating electric and electronic effects for musical instruments; electric and electronic musical effects equipment, namely, musical instrument amplifiers and sound processors; electric and electronic effects units for musical instruments; amplifiers; power amplifiers; variable impedance-adapting circuit sold as a component of amplifiers for musical instruments; software for controlling the operation of audio devices