Galaxy S5 :: Low Volume With Android Phone

For several months now I have been playing the music on my Samsung Galaxy s5 through the stereo speakers on my motorcycle. I turn the volume up all the way on the phone and set the volume on the stereo at about half and I can hear it clearly, even at freeway speeds.

A couple of days ago there was a software update for the phone and now, even with the volume set at maximum on both the phone and stereo, I can't hear anything once I get over about 60 mph.