RIP Ben Johnston 

Source: Wikipedia.

Benjamin Burwell Johnston Jr. (March 15, 1926 – July 21, 2019) was an American contemporary music composer using just intonation. He was called “one of the foremost composers of microtonal music” by Philip Bush (1997) and “one of the best non-famous composers this country has to offer” by John Rockwell (1990).

Sad news indeed. You can read our review of one of his recordings here.