Electronic components in the nature of low pass filters for musical instruments; Electronic effects units for musical instruments; Electronic components in the nature of sound frequency filters for controlling audio parameters by raising or lowering the gain of specific audio frequencies using a resonant filter

'audio':30,40 'compon':2,20 'control':29 'effect':14 'electron':1,13,19 'filter':9,27,45 'frequenc':26,41 'gain':37 'instrument':12,18 'low':7 'lower':35 'music':11,17 'natur':5,23 'paramet':31 'pass':8 'rais':33 'reson':44 'sound':25 'specif':39 'unit':15 'use':42

SPECTRAVOX

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