The sound box has a murmur when it plays.

In the use of computers to listen to music, watching video, speakers have a clear murmur.

First in other computers using speakers, to see if there is a murmur, if there is a murmur is the problem of the sound, you can repair or replace the speakers. Second, replace the slot of the sound card, away from other cards, especially away from the graphics card. The jamming of the video card is strong, may disturb the sound card, appear murmur. Finally, you can also unplug the audio cable from the sound card for testing, if there is no noise, it is the audio line caused by the noise, replace the audio line can be.