Natural ore
The natural third denotes the major third in pure tuning and corresponds to the interval between the 4th and 5th position in the natural tone row and a frequency ratio of 5: 4 (= 80:64). That corresponds to 386.31 cents . The term natural third is mainly used when it should be made clear that the major third in Pythagorean tuning is not meant, which is made up of 4 steps in the circle of fifths and has a frequency ratio of 81:64. That's 407.82 cents. In the evenly tempered tuning , the major third is defined as 400 cents.
The natural third in West African music was likely a basis for the development of the characteristic blue notes in African American musical styles such as jazz and blues . The third is voiced freely between the major and minor third , based on the natural third .
literature
- Michael Dickreiter , Volker Dittel, Wolfgang Hoeg, Martin Wöhr (eds.), Handbuch der Tonstudiotechnik , 8th, revised and expanded edition, 2 volumes, publisher: Walter de Gruyter, Berlin / Boston, 2014, ISBN 978-3-11- 028978-7 or e- ISBN 978-3-11-031650-6