You should also make sure that your headphone is set as the default audio device on your system. This problem is most likely to occur if you have selected the speaker as the default output audio device. So, you need to check and set your headphone as the default audio device to fix the problem. Here is how you can do that:
Now, try playing an audio file on your PC and then check whether the problem is resolved.
(Registry tweaks doesn't change any sound related settings)
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