Audio Damage Vapor - Manual (Page 9)

6. Lo-Cut
The lo-cut button, when depressed, places a high-pass filter between Vapor’s input and its diffusion network.
This filter removes low frequencies from the signal which can make the processed signal sound bass-heavy or
muddy. Turn on the lo-cut button if you find that Vapor's output is occupying too much of the low-frequency
end of your mix. Click the button to toggle it between on and off.