Harsh Digital Nose is a synthesizer that converts two images into two oscillator waveforms and then mixes them in various horrible ways. You can drag and drop images or draw them on the plugin in real time.
There are two image-based oscillators. The knobs between them apply to the second image, based on the first image. There is then a third oscillator that plays ordinary waveforms, which can be modulated by the image oscillators. The "M" button below each pitch knob toggles on/off the oscillator pitch following input MIDI notes. The little green and red dots on the images are the start and end points of the oscillator waveform. Colors in the images do "something" (???).