Question / Help Problem In recording internal audio.

I have been experiencing a problem, every time I record a video both the internal audio and the mic / aux gets very high, sizzling, it seems that it is being captured by a microphone of 1 dollar and this problem makes the audio horrible without fidelity. Does anybody know how to solve this? Thank you very much in advance.
Note: I am using a Dell Gaming Notebook 7567.See how the internal audio is.
 
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