lowpass |
Standard second-order resonant lowpass filter with 12dB/octave rolloff. Frequencies below the cutoff pass through; frequencies above it are attenuated. |
The cutoff frequency. |
Indicates how peaked the frequency is around the cutoff. The greater the value is, the greater is the peak. |
Not used |
highpass |
Standard second-order resonant highpass filter with 12dB/octave rolloff. Frequencies below the cutoff are attenuated; frequencies above it pass through. |
The cutoff frequency. |
Indicates how peaked the frequency is around the cutoff. The greater the value, the greater the peak. |
Not used |
bandpass |
Standard second-order bandpass filter. Frequencies outside the given range of frequencies are attenuated; the frequencies inside it pass through. |
The center of the range of frequencies. |
Controls the width of the frequency band. The greater the Q value, the smaller the frequency band. |
Not used |
lowshelf |
Standard second-order lowshelf filter. Frequencies lower than the frequency get a boost, or an attenuation; frequencies over it are unchanged. |
The upper limit of the frequencies getting a boost or an attenuation. |
Not used |
The boost, in dB, to be applied; if negative, it will be an attenuation. |
highshelf |
Standard second-order highshelf filter. Frequencies higher than the frequency get a boost or an attenuation; frequencies lower than it are unchanged. |
The lower limit of the frequencies getting a boost or an attenuation. |
Not used |
The boost, in dB, to be applied; if negative, it will be an attenuation. |
peaking |
Frequencies inside the range get a boost or an attenuation; frequencies outside it are unchanged. |
The middle of the frequency range getting a boost or an attenuation. |
Controls the width of the frequency band. The greater the Q value, the smaller the frequency band. |
The boost, in dB, to be applied; if negative, it will be an attenuation. |
notch |
Standard notch filter, also called a band-stop or band-rejection filter. It is the opposite of a bandpass filter: frequencies outside the give range of frequencies pass through; frequencies inside it are attenuated. |
The center of the range of frequencies. |
Controls the width of the frequency band. The greater the Q value, the smaller the frequency band. |
Not used |
allpass |
Standard second-order allpass filter. It lets all frequencies through, but changes the phase-relationship between the various frequencies. |
The frequency with the maximal group delay, that is, the frequency where the center of the phase transition occurs. |
Controls how sharp the transition is at the medium frequency. The larger this parameter is, the sharper and larger the transition will be. |
Not used |