Tilt EQ is a free VST Plugin to achieve a linear tilt function with a single knob. This way the spectral balance of audio material can be changed very easily without introducing colouration.
The center frequency of the tilt function is 1300 Hz.
Tilt EQ is based on FIR filters that can be either linear or minimum phase. Traditional minimum phase shelving IIR filters also have been implemented in order to allow further adjustments. The following graphs show second order shelving filters in comparison to the FIR approach with linear slope. The tilt of the slope can be set by the linear tilt knob. The steepness of the slope is given in dB/oct.
The following graph shows two different settings with the linear slope set to maximum, in this case -1dB / oct. and 1dB/oct:
Highshelf filters with gain = +-3dB, Freq = 4500 Hz
Lowshelf filters with gain = +-6dB, Freq = 125 Hz:
For windows you may need to install Microsoft Visual C++ Redistributable für Visual Studio 2017, which is available at https://www.visualstudio.com/de/downloads/ at the bottom of the page.
TiltEQ for MAC requires at least Yosemite (OS-X 10.10).
Please buy me a coffee, if you find TiltEQ usefull:
V_0.14: Fixed wrong behavior when using Pyramix offline rendering
TiltEQ 32 bit should now also support the old Windows XP
V_0.13: Removed knob movement bug
-V_0.12: Removed noise when switching on/off
-Plugin reports delay immediately
-Now working with MKL for better performance
Matthias Kock 2017
matthiaskock at gmx.net