Question :
Is there a simple way to play an audio clip backwards, so reverse the direction of the audio, on macOS ?

Answer :
Reversing the play-direction in QuickTime is very simple on macOS :
– open the audio clip in QuickTime
– slide the indicator to the end of the clip (in the time slider above the Play button) – or just play the audio clip forward once
– when the indicator is entirely at the right end of the slider, press the [CMD] + [LEFT] key combo on your keyboard
– now the sound will be played in reverse

That’s it !

enjoy 😉