It was a long time ago, over 40 years to be more precise, and I was half-dozing in the middle of the afternoon...resting up for my job at night.
I has the radio on and I wasn't paying strict attention, just letting the classical music kind of wash over me. And then, a sound-scape, a musical palette I had never heard the like of before began. I was instantly hooked, and it was one of those moments when you have to listen intently; not only to hear the entire piece, but also to make sure not to miss the information about it at the end, because you have to know what this music is.
That was the first time I heard "Mysterious Mountain," the Symphony No. 2 by Alan Hovhaness, played by the Chicago Symphony Orchestra under Fritz Reiner. My horizon had just gotten bigger.