The selective amplification or attenuation of certain frequencies. Also refers to recognized industry standards for recording and reproducing ‘characteristics’ such as the NAB standard curve.

Graphical representation of the adjustment of amplitude over the range of frequencies in an audio recording. The adjustments are made at the recording stage to compensate for uneven reproduction in the recording system. A number of different standards have been used by the recording industry over the years.


A device that is designed to change the frequency balance of a signal.