Fabfilter Pro Q 4 - Download An equalizer is probably the tool you use most while mixing and mastering, so you need the best of the best. With FabFilter Pro-Q 4, you get the highest possible sound quality, a very extensive feature set, and a gorgeous, innovative interface with unrivalled ease of use. This product comes in the form of an automated email, containing the serial activation code and a link to the relevant website. This should arrive within a few minutes of your successful purchase. If you have not received your email within 20 minutes, please check your junk/spam folders first and then call or message us for assistance. With Pro-Q 4, you can control any other plug-in instance in your session from a single interface, easily navigating the list by filtering, pinning and zooming as you like. Once you know how to use it, the Instance List will be a huge time saver, making it much easier to setup initial EQing when starting your mix session. In Spectral dynamics mode, Pro-Q 4 doesn't change the gain of the whole band, but triggers per specific frequency within that band when it exceeds the threshold, leaving other frequencies untouched. It's a great way of treating varying problem frequencies in your audio. Typically, you would need a separate, dedicated and often complex plug-in for this type of processing, but Pro-Q 4 makes the process simple to use and easy to understand, as a logical extension of normal dynamic processing.