The angelic chorus you hear accompanying the sound of the crickets is NOT a synthesizer or a chorus singing. It's the crickets themselves (slowed down) creating the effect. Really an amazing thing they've accomplished here.
This recording is an extended digitally remixed and mastered version taken from the original 1992 recording entitled "Ballad of the Twisted Hair" from the album "Medicine Songs" by David Carson and Little Wolf Band produced by Jim Wilson and released on Raven Records.
This unusual recording contains two tracks:
1. the natural sound of crickets chirping
2. the sound of the crickets slowed down to match and mirror the length of the average lifespan of a human being.