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Two control knobs for a heating/cooling system. The left knob controls the temperature while the right controls the fan speed. A control knob is a rotary device used to provide manual input adjustments to a mechanical/electrical system when grasped and turned by a human operator, so that differing extent of knob rotation corresponds to different desired input.
The 'log pot', that is, a potentiometer has a resistance, taper, or, "curve" (or law) of a logarithmic (log) form, is used as the volume control in audio power amplifiers, where it is also called an "audio taper pot", because the amplitude response of the human ear is approximately logarithmic. It ensures that on a volume control marked 0 to 10 ...
The faders were connected to constant bandwidth, variable Q, 1/2-octave filters placed on octave centers but with adjustable frequency knobs to shift the center frequency for greater flexibility. [11] A limited number of units were sold to audiophiles and audio researchers. By 1977, all of Crown's tape recorder products had been phased out. [2]
Following its founding, RCA acted as the sales agent for a small line of Westinghouse and GE branded receivers and parts used by home constructors, originally for a limited market of amateur radio enthusiasts. By 1922, the rise of broadcasting had dramatically increased the demand for radio equipment by the general public, and this development ...
Wheels and knobs: Used to add effects to a sound that are not present by default, such as vibrato, panning, envelope, tremolo, pitch bending, portamento and so on. A common control on contemporary keyboards is the pitch bend wheel , adjusting the pitch of a note usually in the range of 2 semitones .
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