This excerpt from Ableton's Learn Live series walks through three grain playback controls inside Emit's Grain tab: Pitch, Glide, and Blur. Pitch shifts the audio up or down, with a fine-tune option for precise adjustments.
Glide smooths transitions between audio slices, and turning it up produces a time-stretching effect. Blur works in the frequency domain, applying an envelope that creates a metallic, ringing-out quality as it increases.