Avatar ST is most suited for a large variety of pads, soundscapes, atmospheres or related FX sounds but can do other sounds like e.g. certain kinds of basses too. The 16-Step Modulator allows sounds to be fairly rhythmical in various ways if required. Also you can have one section step-modulated while the the other is not as there are two complete sections with oscillators, modifiers, VCA EG, Delay, Pan and Reverb send, plus a grain processor and a multimode filter to be inserted via different audio routings. In addition there are a lot of modulation options you might select from in order to tailor your sound.