rharv,

You certainly mean everything below 100 Hz, not 100k!

I also prefer more than the coarse precision of a 10 band EQ, hence the recommendation for a tunable high-pass filter. Those GVST plugins are light on CPU usage, and very nice as a package freebie deal.

John, you've likely used countless hardware mixers in your days. Ever seen a 'low cut' switch on a mixer or a microphone? Guess what, it's a High Pass filter with a fixed cutoff frequency.

Easiest way to clean up a muddy mix is to start taking out low frequency content where it's not necessary, with high-pass filtering as the first swipe. Not too much other than bass guitar and kick drum that need any content below 80-100 Hz.

My 2 cents again. Try it, and I'll bet it ends up being worth far more than 2 cents.