Repeat One means that always repeat the same song playback. For example, if you set Repeat One, then device will always repeat play the song you selected, it will never switch to next song unless you press NEXT button.
Repeat All means cycle repeat playback. For example you have 4 audios/songs in device, if you set Repeat All, the device will switch to the next song automatically after the previous song finished, and always cycle playback like this: 1-2-3-4-1….
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