But Live also features the revolutionary Session View: a unique sketchpad for improvising, playing and performing with musical ideas, without the constraints of the timeline. Freely and independently start and stop any number of audio or MIDI loops - everything stays in sync. Almost everything in Live works in real-time - add, reorder or remove devices, play with Live's flexible track routing and more - all without interrupting your creative flow.

https://www.ableton.com/en/live/new-in-9/