Fabfilter Pro Q 4 UPGRADE - Download 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 purchaseIf you have not received your email within 20 minutes, please check your junk/spam folders first and then call or message us for assistance. UPGRADE FOR EXISTING USERS ONLY 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. 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.