Tonus peregrinus

For the vocal ensemble, see Tonus Peregrinus (vocal ensemble).

The tonus peregrinus, also known as the wandering tone,[1] or the ninth tone, is a psalm tone used in Gregorian chant.

  1. ^ Fisher, A. J. (2013). "The history of a curious tone". Early Music. 41 (3): 502–504. doi:10.1093/em/cat056.