Low, High, Band Pass & Band Stop Filters

Select FILTERS from the File\Effects Menu

Figure 1: A pop-up mini menu appears with a selection of filters available. Select the Low-Pass Filter

Main menu as in Figure 2 apprears with a large selection of proven Low-Pass filter algorythmns.

Figure 2: Low Pass Filter: A low-pass is a filter that passes sound with a frequency lower than a certain cutoff frequency and lowers
or cuts off audio with frequencies higher than the cutoff frequency. A low-pass filter is the complement of a high-pass filter.

High frequencies in the waveform are attenuated.however the Low-Pass filter has little effect below the cut-off frequency.

Each selectable Low-Pass filter has different effects on frequency and amount of attentuation. Experiment with each or for further

education on the posted Low-Pass filters, check online at "Wikipedia" for the properties of the respective named filters.

Figure 3: High-Pass Filter A high-pass filter is an electronic filter that passes signals with a frequency higher than a certain

cutoff frequency and attenuates signals with frequencies lower than the cutoff frequency. The amount of attenuation for each

frequency depends on the filter design.

Each selectable High-Pass filter has different effects on frequency and amount of attentuation. Experiment with each or for further

education on the posted High-Pass filters, check online at "Wikipedia" for the properties of the respective named filters.

Figure 4: Band-Pass Filter A band-pass filter is a device that passes frequencies within a certain range and rejects (attenuates)
frequencies outside that range. A bandpass filter allows signals within a selected range of frequencies to be heard or decoded,

while preventing signals at unwanted frequencies from getting through.

Each selectable Band-Pass filter has different effects on frequency and amount of attentuation. Experiment with each or for further

education on the posted Band-Pass filters, check online at "Wikipedia" for the properties of the respective named filters.

Figure 5: Band-Stop Filter In signal processing, a band-stop filter passes most frequencies unaltered, but attenuates those in a specific
range to very low levels. It is the opposite of a band-pass filter.
A notch filter is another name band-stop filter with a narrow stopband (high Q factor).

Each selectable Band-Stop filter has different effects on frequency and amount of attentuation. Experiment with each or for further

education on the posted Band-Stop filters, check online at "Wikipedia" for the properties of the respective named filters.

Low, High, Band Pass & Band Stop Filters

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