The single-band EQ can operate in several modes. When you choose an EQ from the EQ Mode pop-up menu, the parameters shown below change. You can choose:
Low Cut or High Cut Filter: Low Cut Filter attenuates the frequency range that falls below the selected frequency. High Cut Filter attenuates the frequency range above the selected frequency.
High Shelf or Low Shelf EQ: Low Shelving EQ affects only the frequency range that falls below the selected frequency. High Shelving EQ affects only the frequency range above the selected frequency.
Parametric EQ: Parametric EQ is a simple filter with a variable center frequency. It can be used to boost or cut any frequency band in the audio spectrum, either with a wide frequency range or as a notch filter with a very narrow range. A symmetrical frequency range on either side of the center frequency is boosted or cut.
Single-Band EQ parameters
Frequency slider and field: Set the cutoff frequency.
Gain slider and field (Shelf and Parametric filters only): Set the amount of cut or boost.
Slope pop-up menu (Cut filters only): Choose the amount of cut, in decibels per octave. The higher the value, the more pronounced the effect.
Q-Factor slider and field: Set the Q (bandwidth).