Atonoise Pro is an atonal synthesizer designed for SciFi and others alike sounds.
It's got no filter by design and you won't hardly ever hear the basic waveforms. It's working atonal i.e. with no real defined pitch for various kinds of noisy sounds.
Atonoise is basically not meant for full polyphonic play, rather than mono- or duophonic though 5 voices are supported simply to have some reserve at longer release settings of the ADSR. Using more than two voices even might lead to slight distortions - in such case lower the levels at the oscillators or Dry/Wet.
2 oscillators each with a level adjust and both followed by one amp ADSR EG. The different waveforms simply provide different flavours to the modifiers.
4 modifiers: Inferno and Spook 1 to Spook 3. Inferno adds via Inferno Mix some upper harmonics generated from the input very similar to the timbre feature of my Swamp VSTi. Spook 1 and Spook 2 modifiers can be used as single, in parallel 1|2 or in series 1-2 (see image Signal flow below). The spook amount is determined by the two spook knobs while the XY-Pad ads more or less density i.e. a fairly metallic sound in lower left corner or less density at upper right corner. This can be modulated by selectable and even invertible LFOs. Moving the 'Ghost' image like a joystick ball manually is another option to modulate density. Spook 3 adds even some kind of reverbish flavour when slider is moved to the right.
Anyway please note that using all four modifiers at the same time may soon be the overdose to the mix instead try with more subtle settings by selecting only two or three modifiers.