User Guide

38 Chapter 2 Delay
Editing the Filter Cutoff Parameters in the Tap Display
While the steps outlined above apply for most graphically editable parameters, the
Cutoff and Pan parameters work in a slightly different fashion.
In the 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 (upper line is lowpass, 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 the tap first passes through one
filter, then the other.
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 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-reject filter).