I have worked for several years as an engineer, making gadgets of various sorts. For years I’ve sat in front of my computer, studied diagrams, scribbled notes, attended meetings, and worked with a team of sometimes dozens of people, to produce something that will be useful to people. The end result is usually satisfying, and we know we have worked well to design something good. Someone looking at our work probably would not appreciate everything that we did to make it work. But they would know that humans created it.
This is 4-part SATB harmony, "a capella". A joy to sing.
I'm not sure of the origin of this piece. My wife learned it by ear from a friend at church. Years later she sang it to me, as well as harmonies, from memory. I transcribed it with modifications.
I arranged this well-known piece for 4 men. Nothing too fancy, just 4-part harmony. One of the harmonies is above the melody (I guess you'd call it a descant).