The Pro-Q Precision EQ combines a clean and accurate sound and a "never-before-seen" feature set that has none of the sacrifices you normally have to make when choosing an EQ.

With Pro-Q it's easy and intuitive to create and edit up to 24 EQ bands with multiple curves. Pro-Q has a zero latency mode, but – unlike so many other EQs - greater transparency and precision is possible with the option to switch to a linear phase mode with adjustable latency. There's also a built-in, real-time frequency analyzer that gives instant visual feedback of your signal's frequency content – be it pre- or post-EQ.

With total control of the frequency curve and visual feedback relaying instant analysis of the signal processing also comes superb sound quality. Pro-Q's filter algorithms offer precise analog modeling and unlimited internal headroom. There's also a mid/side EQ option for the "ultimate in sparkle and width" for your mixes.

Such a comprehensive feature-set would usually impact on ease of use but Pro-Q's intuitive interface makes precise editing a breeze. The plug-in also incorporates FabFilter's clutter free 'what-you-use-is-what-you-see' feature so only displays the curves that are in use with their associated controls.

Ultimately, then, Pro-Q aims to offer the best of everything: functionality and usability with a feature-set and sound you've always asked for behind an interface that will enhance your creativity and give you precise control over your EQ every time.

Features:

• A great sound from state of the art filter algorithms with precise analog modeling and unlimited internal headroom (no clipping).
• Operates either in zero latency mode, or in linear phase mode with adjustable latency.
• Interface that is ideal for easy and precise editing.
• What-you-use-is-what-you-see to minimize screen clutter and maximize usability.
• The ability to create new EQ bands just by dragging the frequency curve.
• Select multiple curves to drag and edit in parallel.
• Up to 24 EQ bands.
• Filter shapes: Bell, High/Low Shelf, High/Low Cut with 6, 12, 24 and 48dB/oct slopes.
• Each band can operate on the stereo signal or on the left or right channels independently for per-channel EQ-ing.
• Mid/side mode to EQ the mid and side signals separately.
• Built-in real-time frequency analyzer with Pre- and Post-EQ modes.
• Ability to double-click for text entry of parameter values.
• Different display ranges: 6dB range for mastering use, 12dB, and 30dB for sound shaping during mixing.
• All the usual FabFilter features you've come to expect: perfectly fine-tuned knobs and controllers, interactive MIDI Learn, undo/redo and A/B switch, Smart Parameter Interpolation for smooth parameter transitions, an extensive help file with interactive help hints, sample accurate automation, and AltiVec and SSE optimization.

Changes in v2.0

• More than twice as efficient as its predecessor!
• Enhanced analog magnitude matching in Zero Latency mode
• Natural Phase mode for matching the magniture response of analog EQ
• Full Screen mode for precise adjustments
• Spectrum Grab: just grab and adjust a peak in the real-time spectrum analyzer right away!
• Universal slope support for all filter shapes, for example enabling you to make ultra-narrow bell filters or very steep shelves.
• Slopes up to 96 dB/oct are now supported, including 18, 30, 36 and 72 dB/oct
• Enhanced Linear Phase mode
• New EQ filter types: Tilt Shelf and Band-Pass, in addition to the existing Bell, High/Low Cut, High/Low Shelf and Notch filter shapes
• Gain-Q interaction option: when enabled, Q and gain influence each other in a pleasant way often found in analog mixing consoles
• EQ Match feature to automatically match the spectrum of another track via the side-chain input
• Auto Gain automatically adjusts the output gain to compensate for the audible gain loss or increase introduced by the active EQ bands
• Improved spectrum analyzer with adjustable range, tilt, freeze, and horizontal zooming
• Optional piano roll display
• Flexible interface resizing
• Full output level meter
• Phase Invert option

Changes in v1.23

• Corrected issue with typed parameter values rounded incorrectly.
• AAX plug-in fix for reactivation bug

Changes in v1.22:

• 64-bit AAX compatibility (Pro Tools11)
• Updated 32-bit AAX plugin format to v2
• Changing paramater via the mouse wheel now works properly
• Control switches via the mouse wheel
• VST3 side-chain audition bug corrected
• FabFilter Pro-Q mouse wheel bugfix
• Various other bugfixes and improvements

Changes in v1.21

• Various minor improvements and bugfixes
• In FabFilter Pro-Q, Bugfix forAuto-Adjust Display Range feature
• Workaround for Maschine by NI bug for VST 2 plug-ins
• BugFix for interface issues on some hosts on Mac OS X
• Bugfix for possible crash on Mac OS X
• Workaround for resizing bug in Ableton 8 on Mac OS X VST plug-ins
• BugFix for incorrect MIDI message handling on Mac OS X
• Bugfix for graphical glitches when resizing the plug-in interfaces on Mac OS X

Changes in v1.20

• The Mac OS X version now requires OS X 10.5 and an Intel processor. They still offer previous versions for download for older OS X 10.4 or PowerPC support
• Now lets you adjust frequency, Q and gain knobs as a group
• Now support features in VST 3.5
• Now with GPU-powered graphics acceleration based on FabFilter Pro-DS
• Added mouse wheel support to buttons with pop-up menus
• Now lets you open Other Preset option to the presets menu
• Support for Steinberg's CMC-AI
• Bugfix for compatibility issues with Adobe Premiere.
• Bugfix for bug where the mono AudioSuite plug-ins cause the Whole File option at the bottom to be disabled.
• Various other bugfixes

Changes in v1.13

• AAX plug-in support
• Improved parameter automation in AU
• Fixing the "space key stealing" problem in Studio One and FL Studio
• Improved mouse handling behavior in Pro Tools
• Added more support for Pro Tools hardware control interfaces

v1.11 is a bugfix release - in some cases in certain hosts, after bypassing and re-enabling FabFilter Pro-Q via the bypass button provided by the host, the plug-ins could remain in the bypassed state. This problem has now been fixed in the latest versions.