How to use the FabFilter Pro Q3 for mastering?
First of all, the FabFilter Pro Q3 is a great EQ that offers up to 24 bands.
Each band can be made dynamic and controlled with accuracy. Furthermore, linear phase mode makes it an excellent option for mastering when you need to attenuate aspects of the low frequency range.
Without introducing unwanted changes in Phase response like we would get from other types or filters such as Butterworth Filters which are more commonly used in studio recording situations.
Where they will introduce distortion at high frequencies if not set properly because being non-linear by nature doesn’t allow these filters work well across all frequencies whereas Linear Phase Filter allows them too so this type of filter should always be preferred over others especially when working on mixes that have been mastered already since what’s recorded.
The mid-side functionality is a great feature because it can be used to make your low end mono, expand the stereo image of your sound, and control how well phase relationships are between the side channels.