There’s a great little article over on The Pro Audio Files exploring the difference between Linear and Minimum Phase EQ’s. I’ve been lucky enough to talk about it with some people far smarter than I am at AES conventions, and the article provides a concise but pointed introduction to the subject.
One of the most popular searches relating to linear-phase EQ on Google is “linear-phase explained,” which still holds very poor results. After the search, I was still grasping at straws. I said “to hell with it,” and held my own experimentation.
I created a new Pro Tools session with an oscillator at 1 kHz and line level running separately through a minimum-phase EQ plug-in and a linear-phase EQ plug-in. I recorded the results and was astounded by the differences when I boosted or cut frequencies at any bandwidth or frequency.