what is the best way to add backround music

what is the best way to add backround music
I curently have it as a Audio Source to a object in the Scene but it lags
is there a beter way

Its strange that a single audio source would cause lag issues. Is it the sound itself that is lagging, or is there a frame rate drop? If you put physics on an object so it falls, is the object’s movement smooth and it is just the audio that is having issues?

I would also set the audio source/sound asset to 2D so 3D calculations do not need to be made for the sound.

looks like the best way is to atatch it to the camara or set it to 2D