audio settings

Hello friends, An issue has recently arisen that has ruined the enjoyment of listening to music in my Ranger. I began noticing about two weeks ago that the sound was tinny and I was not getting the full dynamic range. So I went to the sound settings and noticed that my Fade was set all the way...

Does anyone know where the Stero/Mono Audio setting is found? I have re-set the audio and do not seem to get stereo sound.