Editing Filter Cutoff in Delay Designer’s Tap Display
Whereas the steps outlined in
Editing Parameters in Delay Designer’s Tap Display
apply
to most graphically editable parameters, the Cutoff and Pan parameters work in a slightly
different fashion.
In Cutoff view, each tap actually shows two parameters: highpass and lowpass filter cutoff
frequency. The filter cutoff values can be adjusted independently by dragging the specific
cutoff frequency line—the upper line is lowpass and the lower line is highpass—or both
cutoff frequencies can be adjusted by dragging between them.
When the highpass filter cutoff frequency value is lower than that of the lowpass cutoff
frequency, only one line is shown. This line represents the frequency band that passes
through the filters—in other words, the filters act as a bandpass filter. In this configuration,
the two filters operate serially, meaning that the tap passes through one filter first, then
the other.
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Chapter 2
Echo Effects
If the highpass filter’s cutoff frequency value is above that of the lowpass filter cutoff
frequency, the filter switches from serial operation to parallel operation, meaning that
the tap passes through both filters simultaneously. In this case, the space between the
two cutoff frequencies represents the frequency band being rejected—in other words,
the filters act as a band-rejection filter.