at the moment I experiment with the AudioStreamPlayer2D. If my character is on the left side of the screen, the audio comes only from the left speaker. If I am on the right side of the screen, I hear the audio from the right speaker only.
How I set the "spreading"? I want to still hear 30 % from the left speaker if I am on the right side of the screen... at the moment the panning is is to extreme to get a nice sound environment.