Consultation, inspection and quality control, all relating to the design and manufacture of consumer audio equipment and professional audio equipment

Stringed musical instruments, namely; guitars, basses, violins and cellos; keyboard musical instruments, namely; pianos and keyboards; percussion musical instruments, namely drums; and transducers and signal processors for use with musical instruments

Professional and consumer electronic audio equipment, namely - microphones, amplifiers, signal processors, mixers, loudspeakers, audio recorders and/or playback units, audiovisual recorders and/or playback units, transducers and signal processors for use with musical instruments, and signal converters