Piggybacking here since I have the same question (I'm on a Mac using REW). Is REW's "headroom" value the preamp value? In other words, for EQ filters requiring 2.6 dB of headroom, should I set my EQ's preamp value to -2.6?
Free just for Windows users, yes? Looks like the MathEQ add-on component is not available in foobar2000 for Mac: https://www.foobar2000.org/mac
Can anyone recommend a free software solution for implementing room EQ on a Mac?