Voxengo CurveEQ VST is a professional WYSIWYG ('what you see is what you get') linear phase spline equalizer. CurveEQ shows you actual filtering information: the filter's frequency response, and both input and output FFT spectrums. You can actually see what the EQ is doing with the sound. This, in turn, allows you to get the best from your mix and your tracks. CurveEQ perfectly suits the needs of mastering, and in some cases CurveEQ is suitable for use as an in-track FX insert.