Music from somewhere

I was in Facebook this AM and heard some celestial sounding music...a cross between smooth jazz elevator and church background organ music??  Did I open up some random clip on Facebook and then not close it correctly?  It was sort of on again off again.  But, now I've realized, it's August 1 and the high school marching band is already practicing.  Unusually cool summer weather means the winders are open and I can catch floating notes every now and then.  Wait!  Are those drums I hear or the morning train?  Doesn't matter...I love all those cool noises.