I bought the whole set of four of these to use in a sensory show for people with special needs. The show is about the four seasons - each of these chimes' notes suits a season brilliantly. Aqua for Spring, Ignis for Summer, Aria for Autumn, and Terra for Winter. The quality of the sound is beautiful, clear and precise. I have based the music for each season on the chords they produce. They inspired me to produce more complex chords to accompany them. My wife is a meditation teacher and she wants a set of these too now. We both love them.