Why audio playing in "slow motion", sounds stretched

hi guys:

I am mad because of this - audio plays in "a slow speed", like stretched.
I have checked that the pitch is 1.
Even in preview window of Audio file while you playing audio, the time past slower than normal .

It is not always happen , but when happened, you can only try restart unity or reboot computer to solve.

Thanks for your advise.

 

Check your samplerate in Edit/Projectsettings/Audio and set it to 48000 manualy, hope this helps