This bit covers Ableton Live's Chorus-Ensemble device in Classic mode, walking through each parameter from the ground up. The presenter explains how Classic mode works by duplicating the input signal twice and shifting each copy in time, with an LFO attached to the delay time to make those copies drift and breathe, which subtly modulates pitch and creates the sensation of multiple layered voices.
Rate controls the speed of the LFO cycle, and Amount controls how far the delay time swings. Pushing both up makes the oscillations audible and pronounced; dialing them back finds the sweet spot where the sound feels warm and full without obvious wobble.
Feedback routes the output back into the signal path, multiplying the sense of stacked copies. At extreme settings it produces a metallic, artificial texture, and flipping the Invert Polarity button shifts that toward something hollower. Heavy feedback also risks clipping, which is where the built-in high-pass filter comes in: raising its frequency cuts the low-end buildup that causes muddiness and distortion, letting you push feedback further without losing control of the mix.