When scrolling, it scales down even further, acting like a scrub speed multiplier. Also, notice how when you tap on a paragraph to play, the scroll/scale transitions at different rates to make it follow a “swooping” motion rather than a linear curve.
When showing/hiding the player controls, the transition has five parts:
1. Controls fade in
2. Controls slide up
3. Spacing between controls expands
4. The background gradient end point (fully transparent) slides up
5. The background gradient fades in separately from the controls