How to pan an sound to left speaker in Unity5?

Unity Engine
1

I know Unity5 supports 3D sounds and I find stereo-pan with [-1,1] to pan the audio source to left or right speakers. While Unity5 support 5.1 and 7.1, how to pan the audio source to rear speaker as the game object is behind me. In Fmod or Wwise, I can pan the audio to any speaker as I want to. Does Unity5 support a 5.1/7.1 panner?

2

Unity’s audio source has been documented for ages now.