The headset playback is a murmur.

In the computer use, the sound can be normal to hear the voice, but the headset, heard is a murmur, can not be used normally.

Sound can play the voice, then the sound card is no problem, replace the headset there is a murmur, all the decision is the headset problem. The headset can be removed for test use on other computers. When you plug in the headset, also pay attention to whether the socket plug wrong. If the headset plugged into the microphone port will have a murmur, if inserted in the speaker port, you can use normally.