Macbook Pro jack Audio problem

Hi, suddenly the audio output from the jack of my macbook pro 13" is "distorted ". everything happened from one day to another. I did not do anything special, I tried to try different audio outputs to see that it was a cable problem, but as occurs with everything that I connect I'm afraid something has happened to my mac. What should I do? Thanks!

I found a temporary solution - killing the coreaudio process resets the audio and I'm good. But what causes it is still uncertain.

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