This, in turn, allows you to get the best from your mix and your tracks. CurveEQ shows you the actual filter response you are designing by means of a spline (a smooth curvy line), plus it displays the output spectrum, so you can readily see what the EQ is doing with the sound. Stereo, mid-side, 5.1 surround equalizerĬurveEQ is a spline equalizer AAX, AudioUnit, and VST plugin for professional sound and music production applications.