9 audio amplifiers, monitor loud speakers, audio mixers, echo machines, headphones, guitar amplifiers, keyboard amplifiers, microphones, graphic equalizers, sound effectors, analog or digital recorders, and parts of aforesaid goods; blank magnetic audio and computer tapes and blank audio and computer optical discs, computer software featuring prerecorded musical tone data and song data for automatic play and autoaccompaniment, and computer software for use with electronic musical instruments