Ditonic scale

Ethnomusicologist Bruno Nettl noted that ditonic scales were common in many parts of the world but often limited to specific music types, such as children's songs, with the exception of some tribal societies.

[2] The Cheremis (Mari people) of Russia employ ditonic scales in children's songs, generally with the two notes a minor third apart.

[2] The Shipibo people of Amazonian Peru used ditonic scales in approximately 2.5% of their music.

"[3] The ca dao folk poetry of Vietnam is sometimes sung in ditonic scales.

[4] Several ditonic scales were noted about the Modoc and Klamath tribes of the North American West Coast, and are also found in the Great Plains in the rituals of the 1800s Ghost Dance religion.