12 April, 2014

Control Circuit Troubleshooting

Treble. After speaking to others on the web, I found the answer. A tone control circuit is an electronic circuit used to modify an audio signal before it is fed to speakers, headphones or recording devices by way of an amplifier. Such circuits consist of a network of highpass, lowpass, and/or bandpass filters. In their most basic form, they attenuate the high or low frequencies of the signal. Active tone controls may also amplify or boost certain frequencies. This is named treble or bass boost or cut, respectively, in the vernacular of audio engineering. More elaborate tone control circuits can elevate or attenuate the middle range of frequencies too. Really elaborate tone controls provide elevation or attenuation in 1/3 octave bands spanning from approximately 30 Hz to 18 kHz. These units are named graphic equalizers because their controls are in the form of sliders that are arranged so as to graphically display the amount of boost or cut being applied at any frequency of interest. The most elaborate units can control not only the boost and cut but also the frequency at which the boost and cut takes place and the bandwidth of the control's action. These are named parametric equalizers because they control all of the equalization parameters.

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