IIEQPro

The IIEQPro is a software equalizer with up to 10 bands and 12
filter types per band to choose from. There are two ways to control the
settings of the bands:
a) By direct interaction with the graphical display.
b) By using the controls in the lower left corner of the user interface

Filter types: The IIEQ Pro offers 12 filter types for each of its 10
bands. The types are:
I. AnaPeak*: a state-of-the-art peak filter whose high frequency
behavior has been adjusted carefully to prevent treble warping. The
peaking curve remains symmetrical up to the Nyquist frequency
(analogue behavior).
II. DigiPeak: a standard digital peak filter as found in most software
EQs. This is kept mainly for historical reasons, and to be able to
compare with more standard EQs.
III. Notch*: a notch filter that allows you to cut very deep holes into
the frequency spectrum. The "Gain" control has no impact on this
filter and is therefore deactivated for notch bands. The notch filter
has also been symmetrized at the Nyquist frequency.
IV. LPF12*: low pass filter with an attenuation of 12 dB/octave.
V. LPF24*: low pass filter with an attenuation of 24 dB/octave.
VI. HPF12: high pass filter with an attenuation of 12 dB/octave. The
"Gain" control, well, you get the picture…
VII. HPF24: high pass filter with an attenuation of 24 dB/octave.
VIII. BPF*: a band pass filter. By changing 'Q' you can not only change the width, but also the gain of the filter at the chosen center frequency
(which will indirectly influence the filter width as well).
IX. BPFII*: a slightly different band pass filter. Now the maximum gain
is always at 0 dB, the 'Q' control influences only the width.
X. APF: an allpass filter that does not change the frequency, but only
the phase response. Can be useful in certain situations with phase
distortions.
XI. LowShelf: low shelf filter. Enhance or decrease frequencies below a certain point.
XII. HighShelf: high shelf filter. Enhance or decrease frequencies above a certain point.

IIEQPro can be bought at any price you want!