At the righthand side of the bottom bar in the interface, FabFilter Pro-Q 2 contains a set of
global output options. As soon as you hover the mouse above the output button, a panel with
various options and a large output/pan knob will pop up, giving you access to the following
The Global Bypass button lets you bypass the entire plug-in. While most
hosts already provide the ability to bypass plug-ins, our internal global bypass feature is
guaranteed to work correctly in linear-phase mode or Natural Phase mode (compensating for the latency of the plug-in) and
also applies soft bypassing to avoid clicks. While the plug-in is bypassed, the EQ display
dims, the bypass button becomes red, and a red line at the top of the output level button
indicates this state as well.
Using the Phase Invert toggle button, you can flip the phase of the output
signal. While Phase Invert is active, the button becomes blue, and a blue line at the top of
the output level button indicates this state as well.
If Auto Gain is enabled, using the button with the 'A' symbol, Pro-Q 2
automatically compensates for increase or loss of gain after EQ'ing. Note that the applied
make-up gain is an educated guess based on the current EQ settings, and is not a
dynamic process based on actually measured levels. While Auto Gain is enabled, the button
becomes yellow, and a yellow line at the top of the output level button indicates this state as
Using the Output Level Metering button, you can choose to show or hide the
level meter at the far right of the interface, which shows the current output level of the
plug-in. Note that FabFilter Pro-Q 2 has unlimited internal headroom and will never
clip itself: the metering indicates clipping only to warn against possible clipping during
further processing of the output signal.
Using the Gain Scale slider, just below the gain level/pan knobs, you can
scale the effect of the gain settings of all curves by dragging horizontally. This can be
very useful when you want to automate the overall effect of the EQ.
Note: This only affects the EQ shapes that actually offer a gain setting: Bell and
Shelving filters. It will not affect the other filter types.
The Output Gain parameter lets you adjust the output level between minus
infinity and +36 dB. You can use this to correct any overall level change that the EQ bands
might introduce. Note that FabFilter Pro-Q 2 features unlimited internal headroom so it won't
clip internally at any level. You only need to be concerned about any clipping that might occur
after the signal has left Pro-Q 2.
The Output Pan parameter lets you change the relative levels of the left
and right audio channels. When Mid/Side mode is active, it adjusts
the relative levels of the mid and side channels instead.
If you would like to enable/disable Auto Gain by default for new instances, simply update
the default preset by clicking Options > Save As Default in the presets
If desired, you can make the output options panel 'sticky' by clicking the output button
once. Click it again to hide the panel.
You can directly adjust the output gain or the gain scale by clicking and dragging the
output button vertically.
When the output knobs are visible, you can double-click them to be able to enter a value
directly using the keyboard.