I need to create feeling like sound is coming from left or right so I put it there physically. Maybe some setting in the object that do the panning? Maybe I need put AudioSource left/right related to player position? Can you help please to choose the correct way?
You can use the Stereo Pan parameter to artificially adjust the sound on left/right.
In your case, maybe Spatial Blend is more adapted, since it calculates the sound spatialized in the 3D world (unlike Stereo Pan which is 2D)
The AudioSource component has a variable called Stereo Pan. That’s what you’re looking for.