Amplifiers; musical instrument amplifiers; audio amplifiers; audio mixers; computer software to control and improve audio equipment sound quality; electric audio playback units with lights and speakers; audio speakers; electrical pickups for use with musical instruments; echo devices for use with musical instruments; musical instrument adaptors; musical instrument connectors; frequency converters; frequency boosters; frequency equalizers; musical tone converters

'adaptor':45 'amplifi':1,4,6 'audio':5,7,15,20,27 'booster':52 'comput':9 'connector':48 'control':12 'convert':50,57 'devic':37 'echo':36 'electr':19,29 'equal':54 'equip':16 'frequenc':49,51,53 'improv':14 'instrument':3,35,42,44,47 'light':24 'mixer':8 'music':2,34,41,43,46,55 'pickup':30 'playback':21 'qualiti':18 'softwar':10 'sound':17 'speaker':26,28 'tone':56 'unit':22 'use':32,39

Musical instruments; tuners and tuning apparatus for musical instruments; tuning forks

'apparatus':6 'fork':11 'instrument':2,9 'music':1,8 'tune':5,10 'tuner':3

AXDXA

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