Four Audio System Software and PPA Manual
EQ Editor

The EQ editor allows to activate / modify fully parametric EQs either by entering their parameters or by dragging them using the corresponding handles.

The editor is located in the input and output tabs and behaves the same in both views.

All actions are sent to the DSP immediately, so the EQs are controlled in real-time.

 

1 Frequency Response Plot Displays the overall frequency response of the EQs (white line). The EQ handles are located at the center frequencies of the corresponding EQs. The frequency response of a single highlighted EQ is displayed shaded.
2 EQ Handles Allow to adjust active EQs by dragging. Using the Ctrl key while dragging up/down adjusts the quality. When deactivated, the handle for the specific EQ disappears.
3 EQ Active Button with status indicator to de-/activate the EQ. When lit, EQ is active
4 EQ Type Control to change EQ-Type. Available: HP/LP 6/12 dB, LoShelve/HiShelve 6/12 dB, Bell filter, Allpass 6/12 dB
5 EQ Frequency Control for EQ frequency. Adjustable between 20 Hz and 24 kHz.
6 EQ Gain EQ gain. Grayed out for certain EQ types (LP/HP, Allpass)
7 EQ Quality Quality of EQ. Not adjustable for LP6 / HP6 / AP6. Adjustable between 0.1 (broad filter) and 1000 (sharp notch filter when using Bell filter)
8 Reset to Defaults Resets the EQ to the default parameters of the system preset.