Sometimes, the singer or the instrument gets too close to the microphone. This is the ideal filter to prevent the harshness of this occurring.
I don't plan to add anything to this plugin bar adding mouse wheel support for ease of use. I've been perfecting the algorithm and it's not perfect yet. I had to make the function from scratch.
I based the filter on existing math provided by Martin Vicanek, and I rewrote it so that it used less math with an experimental iffy method. I'd intended the method to be for low and high passes; but what it ended up resulting in was a lossy method of crossover, that happened to get rid of harshness.
Download Demo Version