One great example of this is vocalist groups. The Enya/Lord of the Rings track "May it Be" as sung by Voces8. https://www.youtube.com/watch?v=x7M5ZqFSynQ https:

One great example of this is vocalist groups. The Enya/Lord of the Rings track "May it Be" as sung by Voces8. https://www.youtube.com/watch?v=x7M5ZqFSynQ https://www.youtube.com/watch?v=x7M5ZqFSynQ Notice how the fifths are perfectly "still", no beating. It can almost sound out of tune if you're too used to tempered tuning.