[SOLVED] Noise speakers by play music,DVD,Video streaming

I have Dell notebook Studio i7-720 1747.When I play music,DVD or Video streaming I listen
noise by speakers.Audio Driver - IDT High Definition Audio Codec and for second monitor-
ATI High Devinitin Audio devices.Sound noise and by listen speach.

Hi.

Please type msconfig in the start menu, then hit enter. Go to the startup tab and then click on "disable all'.

Reboot and test the sound.

If it is good, go to the msconfig startup tab and re-enable only one thing.

Reboot and test.

Do so again and again until you find the issue.

---If disabling all items doesn't help immediately after first reboot, go back and enable everything.

Please tell us the results.

This doesnot help.Thank You