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2. Equalization (audio) - Wikipedia

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

   Equalization (audio) A stereo graphic equalizer. For the left and right bands of the sound content, there are a series of vertical faders, which can be used to boost or cut specific frequency ranges. This equalizer is set to a smiley face curve, in which the mid-range sound frequencies are cut. Equalizers are also made in compact pedal-style ...

3. Smiley face curve - Wikipedia

   en.wikipedia.org/wiki/Smiley_face_curve

   Smiley face curve. 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. This curve is often attained by users employing a graphic equalizer, which shows a graphic representation of a "smile" using its ...

4. RIAA equalization - Wikipedia

   en.wikipedia.org/wiki/RIAA_equalization

   RIAA equalization is a specification for the recording and playback of phonograph records, established by the Recording Industry Association of America (RIAA). The purposes of the equalization are to permit greater recording times (by decreasing the mean width of each groove), to improve sound quality, and to reduce the groove damage that would ...

5. Birmingham Sound Reproducers - Wikipedia

   en.wikipedia.org/wiki/Birmingham_Sound_Reproducers

   Early years. Daniel McLean McDonald (1905–1991) founded Birmingham Sound Reproducers as a private company in 1932 in the West Midlands of England. By 1947, the company chiefly manufactured communications sets ( intercoms ), laboratory test equipment, and sound recording and reproducing instruments including phonographs .

6. Tone control circuit - Wikipedia

   en.wikipedia.org/wiki/Tone_control_circuit

   A tone control circuit is an electronic circuit that consists of a network of filters which modify the signal before it is fed to speakers, headphones or recording devices by way of an amplifier. Tone controls are found on many sound systems: radios, portable music players, boomboxes, public address systems, and musical instrument amplifiers .

7. Exciter (effect) - Wikipedia

   en.wikipedia.org/wiki/Exciter_(effect)

   Exciter (effect) An exciter (also called a harmonic exciter or aural exciter) is an audio signal processing technique used to enhance a signal by dynamic equalization, phase manipulation, harmonic synthesis of (usually) high frequency signals, and through the addition of subtle harmonic distortion. Dynamic equalization involves variation of the ...