Korg PS 3100 - Resonator

The resonator section is made up of 3 filters.
The top knob  adjusts the degree to which the resonator will effect the sound.

They may be set to resonate at a peak anywhere between 100Hz to 10KHz
The 3 resonator knobs will determine the frequency of the resonator peaks.

These filters are great for effecting the timbre.

The switch turns on or off modulation from MG2

The knob limits modulation from external CV which may be patched in via the patch panel to the right.