This is pure audio

Class [9]
Computer & Software Products & Electrical & Scientific Products

Sound amplifiers;Sound amplifiers for musical instruments;Sound amplifying apparatus;Sound amplifying receivers;Sound and picture recording apparatus;Sound cards;Sound carriers;Sound generation apparatus;Sound mixers;Sound mixers with integrated amplifiers;Sound mixing apparatus;Sound processors;Sound projectors;Sound recorders;Sound recording apparatus;Sound recording carriers;Sound recording discs;Sound recording strips;Sound recording tapes;Sound reinforcement apparatus;Sound reproducing apparatus;Sound reproducing equipment;Sound reproduction apparatus;Sound samplers;Sound transmitting apparatus;Soundbar speakers;Soundbars;Sounding apparatus and machines;Acoustic membranes used in sound recording or reproducing apparatus;Analogue sound modifiers;Apparatus for amplifying sound;Apparatus for broadcasting sound, data or images;Apparatus for recording of sound;Apparatus for recording sound;Apparatus for reproduction of sound;Apparatus for the processing of sound;Apparatus for the reproduction of sound;Apparatus for the transmission of sound;Apparatus for transmission of sound;Apparatus for transmitting sound;Cables for the transmission of sounds and images;Central processing units for processing information, data, sound or images;Digital sound processors;Electric cables for the transmission of sounds and images;Electrical amplifiers for sound signals;Electronic audio signal processors for compensating sound distortion in speakers;Electronic effect pedals for use with sound amplifiers;Electronic sound pickups for guitars and basses;Fibres for the transmission of sounds and images;Hi-fi sound systems;Instruments for amplifying sound;Instruments for recording sound;Instruments for the reproduction of sound;Mixing desks [sound];Multichannel sound processors;Musical sound recordings;Personal headphones for use with sound transmitting systems;Playing devices for sound and image carriers;Portable sound recording apparatus;Recording devices for sound and image carriers;Sounding leads;Series of musical sound recordings;Software to control and improve audio equipment sound quality;Hi-fi sound systems;Hi-fi stereo systems.