AVPlayer rate property does not work?

Question

so it would appear that the only values that actually work are 0.0, 0.5, 1.0, and 2.0...

i tried setting it to 0.25 since I want it to play at 1/4th of the natural s

Answer 1

(Xcode 11.6, iOS 13.6, Swift 5)

It doesn't work with

player.rate = 2.0

It works with

player.playImmediately(atRate: 3.0)