For speed-selector label .5x, the replay-step delay is 500 ms, meaning it's twice as fast as 1x (with delay 1000 ms). Likewise, speed 2xhas a delay of 2000 ms and is twice as slow. The labels could mention 0.5s instead of .5x, etc., but since the selector is about speed, it probably makes more sense to swap the step-delay intervals.
For speed-selector label
.5x, the replay-step delay is 500 ms, meaning it's twice as fast as1x(with delay 1000 ms). Likewise, speed2xhas a delay of 2000 ms and is twice as slow. The labels could mention0.5sinstead of.5x, etc., but since the selector is about speed, it probably makes more sense to swap the step-delay intervals.