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2. Equalization (audio) - Wikipedia

   en.wikipedia.org/wiki/Equalization_(audio)

   Stereo 31-band 1/3-octave graphic equalizer for use in sound reinforcement applications. In the graphic equalizer, the input signal is sent to a bank of filters. Each filter passes the portion of the signal present in its own frequency range or band. The amplitude passed by each filter is adjusted using a slide control to boost or cut frequency ...

3. Smiley face curve - Wikipedia

   en.wikipedia.org/wiki/Smiley_face_curve

   An idealized and extreme smiley face curve shown using a 29-band graphic equalizer. A smiley face curve or mid scoop [1] in audio signal processing is a target frequency response curve characterized by boosted low and high frequencies coupled with reduced midrange frequency power.

4. Tone control circuit - Wikipedia

   en.wikipedia.org/wiki/Tone_control_circuit

   Tone control is a type of equalization used to make specific pitches or frequencies in an audio signal softer or louder. It allows a listener to adjust the tone of the sound produced by an audio system to their liking, for example to compensate for inadequate bass response of loudspeakers or earphones, tonal qualities of the room, or hearing impairment.

5. Filter bank - Wikipedia

   en.wikipedia.org/wiki/Filter_bank

   A bank of receivers can be created by performing a sequence of FFTs on overlapping segments of the input data stream. A weighting function (aka window function) is applied to each segment to control the shape of the frequency responses of the filters.

6. Sound reinforcement system - Wikipedia

   en.wikipedia.org/wiki/Sound_reinforcement_system

   Graphic equalizer. Equalizers are electronic devices that allow audio engineers to control the tone and frequencies of the sound in a channel, group (e.g., all the mics on a drumkit) or an entire stage's mix. The bass and treble controls on a home stereo are a simple type of equalizer.

7. RC-5 - Wikipedia

   en.wikipedia.org/wiki/RC-5

   Table 11: RC-5 commands for audio preamplifiers 1 and 2 (systems 16 and 19) other than those listed in Table 2 Command Function Command Function 10 GEQ L (graphic equalizer left channel) 67 11 GEQ R (graphic equalizer right channel) 68 12 Standby 69 13 Master mute/de-mute 70 14 Personal preference settings 72 15 Display user info on local display