Try setting framelimit to auto or audio and disable Limit by fps option if it is enabled. Set gpu to maximum performance in order not to go in low power mode in it's drivers. Then post all the general and graphic setting windows. Your pc is pretty strong and you shouldn't have such issues.
Edit: I just heard the audio samples you posted and there is zero crackling here, moreover unbearable one. Do your speakers/ headphones have issues?
Edit: I just heard the audio samples you posted and there is zero crackling here, moreover unbearable one. Do your speakers/ headphones have issues?