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FILT: Filter Frequency Modulation, or short Filter FM

In Filter FM mode the Oscillator 2 modulates the Filter 1 Cutoff frequency.

Notice that the OSC Mix is fully set to OSC1, which means OSC2 is not directly audible (it’s only used to modulate the Filter 1 Cutoff).

As a matter of course, Filter FM has only effect, if a Filter is applied (see screen shot).


For best results, use high Filter Resonance values.


Controls the depth/amount of the Filter 1 Frequency Modulation (OSC2 > Filter 1 Cutoff frequency).

Note: A good practice is to modulate the OSC MOD Depth with one of the Modulation Envelopes as shown in the screen shot above.

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