“Graphic” devices for this process are often set to produce a smiley face curve. For 10 points each:
[10m] Name this process, often performed using shelving filters, which adjusts the volume of different frequency bands in an audio signal.
ANSWER: equalization [or EQ; accept equalizers]
[10h] When adjusting the settings of a parametric equalizer, you can control the center frequency, the gain, and this quantity, the ratio of the center frequency to the bandwidth.
ANSWER: Q-factor
[10e] Equalization settings are a common feature in these devices, which take a weak signal produced by a guitar's pickup and produce a strong signal that can be sent to a loudspeaker.
ANSWER: amplifier
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