Native Instruments Circular (ESD); Sampler instrument; requires Kontakt or the free Kontakt Player; based on a hybrid concept combining granular and sample engine; layer section with up to 4 layers for textures, rhythms and melodies; Circular Engine with circular modulator for organic modulations; arpeggiator and step sequencer section with variable length, speed and swing; motion section for evolving filter, pitch and effect modulations; built-in effects including filter, delay, reverb, distortion and compression; preset browser with user-preset storage; MIDI Learn support