The primary function of the filter is to remove, hence “cut off,” frequencies from the sound. Omnisphere’s filters can remove frequencies in a variety of ways, from Lowpass, High Pass, Band Pass, and Notch filters, to more specialized types. Depending what Filter preset is chosen, the Cutoff control will remove different frequencies in various ways.
For example, if a Low Pass filter is used, turning the control counter-clockwise will remove higher frequencies. If a High Pass Filter is used, the opposite will happen. It’s best to experiment with the Cutoff control with the wide variety of Filter Types.
The Filter’s roll off slope is measured in dB, and is sometimes expressed in “poles.” The higher the dB value, the greater the extent of the filtering, but this should not be confused with sounding “better.” Filters with fewer poles can often sound more appropriate than those with more poles.
|6dB =||1 Pole|
|12dB =||2 Pole|
|18dB =||3 Pole|
|24dB =||4 Pole|
Range 00.05 kHz to 19.00 kHz
Omnisphere has many specialized filters, some of which are based on tuned delay lines (e.g. Metal Pipe +/- and Resonator +/-). In those cases, the Cutoff is used to tune the filter’s pitch.
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