Use the "Sound" knob on the left to move the tuning dial and morph the waveform from a smooth pulse to raspy sawtooth. Many nuances to find along the way! You can also adjust the drive/distortion, white noise level and tone, as well as tuning in some filter resonance for extra strangeness. And of course, the obligatory delay and rotator knobs for character.
Requires the full version of Kontakt 6.7.1 or above.