Both equalizer bands have almost identical features. You can adjust each band separately.
Band 1/2 buttons: Turn each band on or off. Band 1 is a low shelving EQ. Band 2 is a high shelving EQ. If neither EQ is activated, the signal passes through unaffected.
EQ type buttons: Switch between two different types of EQs: shelving (top button) and peak (lower button).
In shelving mode, all frequencies above or below the set frequency are either increased or reduced.
In peak mode, only frequencies located near the set frequency are affected.
Note: Shelving EQs behave much like synthesizer lowpass and highpass filters. The key difference is that lowpass and highpass filters merely dampen certain frequencies (filter them out), whereas shelving EQs also allow these frequencies to be boosted.
Gain knobs: Boost or cut a certain frequency range as determined by the EQ type and Hz settings. If the Gain knob is set to a value of 0, the EQ has no effect. Option-click a Gain knob (or click the 0 above the Gain knob) to set it to a neutral position.
Frequency field: Drag vertically to set the frequency range to be boosted or reduced. Option-click the parameter to set the value to a neutral position: this is 200 Hz for band 1 and 2000 Hz for band 2.
Q field: Drag vertically to set the Q (quality) factor. The effect of Q on the sound depends on the selected EQ type:
Shelving filters selected: as the Q value increases, the area around the threshold frequency becomes more pronounced.
Peak EQ selected: Q determines the width of the frequency band selection, low Q values select a broad band, and high Q values select a very narrow band to be boosted or reduced with the Gain knobs.
Each EQ band displays parameter changes on a frequency response curve. The display provides access to the Gain, Hz, and Q parameters of each band.
Do any of the following:
To change the EQ frequency, drag horizontally.
To change the Gain, drag vertically.
To change the Q factor, drag the handle shown at the peak (maximum point) of the EQ curve.