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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.
[a] The bass and treble controls in a hi-fi system are each a first-order filter in which the balance of frequencies above and below a point are varied using a single knob. A special case of first-order filters is a first-order high-pass or low-pass filter in which the 6 dB per octave cut of low or high frequencies extends indefinitely.
Diagram of treble, alto, and bass clefs with identical-sounding musical notes aligned vertically Middle C represented on (from left to right) treble, alto, tenor, and bass clefs Three clefs aligned to middle C. A clef (from French: clef 'key') is a musical symbol used to indicate which notes are represented by the lines and spaces on a musical ...
A Bass control is a low-pass filter that produces the same effect over lower pitched sounds. Tone stacks vary in their complexity. The simplest control is a single Tone knob that can be turned from Bass at one extreme to Treble at the other. More complex amps add Treble, Bass, and Middle controls.
Treble describes tones of high frequency or high pitch, ranging from 6 kHz to 20 kHz, [1] comprising the higher end of the human hearing range. In music, this corresponds to high notes. The treble clef is often used to notate such notes. [2] Treble sound is the counterpart to bass sound.
The bass player is a member of the rhythm section in a band, along with the drummer, rhythm guitarist, and, in some cases, a keyboard instrument player (e.g., piano or Hammond organ). The bass player emphasizes the root or fifth of the chord in their basslines (and to a lesser degree, the third of the chord) and accents the strong beats.
Non-pitched percussion notation on a conventional staff once commonly employed the bass clef, but the neutral clef (or "percussion clef"), consisting of two parallel vertical lines, is usually preferred now. It is usual to label each instrument and technique the first time it is introduced, or to add an explanatory footnote, to clarify this.
The most basic amps only have a few knobs, which typically control volume, bass, and treble. More expensive amps may have several knobs that control pre-amp volume (or gain), distortion or overdrive, volume, bass, mid and treble, and reverb. Some older amps (and their re-issued versions) have a knob that controls a vibrato or tremolo effect.