Extron Electronics MVC 121 Plus User Guide - Manual (Page 26)

Note how filter 3 in the figure below is highlighted in yellow, indicating it is the filter
in focus. The results of the filter in focus (independent of other filters) will show in the
graph as a dotted line the same color as its filter row when bypassed. When active (not
bypassed), the line is solid.
Figure 9. Filter Dialog Box, Filter Not Bypassed
When multiple filters are enabled, the graph indicates the focused filter result
(independent of other filters) in the color of the filter row in the type/parameters table.
The composite response of all filters is displayed in red.
Above the graph, each filter has a "handle" (circled in red above) placed directly
above the cutoff or center frequency whose number corresponds to the filter number
(outlined in red). Clicking a handle or clicking the table row brings focus to that filter.
Click+hold+dragging the handle horizontally changes the cutoff or center frequency to a
new position on the x axis.
Parametric (Equalizer)
Up to three parametric filters can be placed in the filter box at one time. Each may be set
to a different frequency creating a 3 band parametric equalizer. The control will boost or
cut the center frequency, and by changing the Q value, the range of affected frequencies
can be widened or narrowed around the center frequency. In general, the higher the Q,
the narrower the affected bandwidth.
MVC 121 Plus • Operation 20