Can anyone help me solve the audio/video delay problem properly?

hello everyone! Can anyone help me solve the audio/video delay problem properly? I am using, as a setting, the original music (the one recommended for musicians) but still the video comes before the audio even if I do a one to one meeting. Teaching dance you understand that it is not acceptable that audio arrives later than video...

I add an info that may be of some importance: I use a Mac Book Air

Thanks a lot

Dario