\dahy-uh-PEY-zuhn\ , noun:
1. A full, rich outpouring of melodious sound.
I do not know if this song is the most beautiful diapason in the world, or if it just means a lot to me.
I was listening to Pandora one evening while reading. The station was most likely Mumford & Sons or James Taylor and was naturally full of others that resembled them. Though, when we got the call that my grandma had passed away, this song came on. It was the first instrumental song on the station (that I had noticed). It was soothing and stunning. I feel this diapason sounds like heaven. Please enjoy.