LinPlug Octopus User Manual
Page 60

Next we'll add some filtering to the patch.
9. To incorporate a filter into the patch, first change the settings in the
Oscillator Matrix so that Osc 1 is no longer routed directly to the Mix
but instead is sent to Filter 1.
10. Set the output of Filter 1 to the Mix.
11. Set up the Filter to the desired type and values as shown below.
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