Interactive filter display

The interactive filter display gives an overview of the filter parameters and makes it very easy to adjust multiple filter parameters simultaneously. The vertical lines in the background represent a logarithmic scale that correspond to the actual filter frequencies.

Drag a filter dot to adjust the Frequency and Peak parameters for that filter. The active filter will have a light colored ring around its filter dot in the display (filter 2 in the screen shot above).
Drag the link dot (between filter 1 and 3 in the screen shot above) to adjust all linked filters simultaneously. To link filters, click on the link buttons that appear when the mouse is just above the filter buttons. For example, you can set them up as 4 resonant band-pass filters and sweep the cutoffs simultaneously. This configuration will give you access to all manner of 'vocal' sounds, as well as even more dramatic formant-based timbres.
Shift+click a filter dot to toggle between the different filter slopes.
Ctrl+click (Command+click on Mac) a filter dot to toggle between the different filter responses.
When holding down the Alt key while dragging a filter dot, the other linked filters will change accordingly, as if you where dragging the link dot.
Holding down both the Alt+Ctrl keys (Alt+Command keys on Mac) while dragging a filter dot will adjust all linked filters while fixing the link dot in the center, so the other linked filters will 'mirror' the changes.

Tips

Of course, all changes made in the filter display can be automated!
You can connect a MIDI controller to either the frequency or the peak adjustment of the link dot with the MIDI Learn feature.

Next: Routing

See Also
Filters
Filter parameters