Fix the playback speed if it's too fast
Edited
If the playback speed is too fast, you may have accidentally activated the speed playback control.
Look at the bottom-left corner of the full-screen player.
Find an blue circle with a number inside (e.g., 1.2x, 1.5x, or 2x).In Android the number appears without a circle.
To listen at normal speed, the circle/number should be white and display (1x).
Tap on the circle/number until you see (1x).