A classification of Byzantine singing voices based on singer´s formant

A classification of different singing voices of Greek psaltes (chanters) of the Church, based on the relative positions and shapes of the ≪singer´s formant≫ (SF) is presented. It was found that there are 8 categories defined on basis of the following criteria: (1) the location of the center of the clustered vowels in the corre-logram (F3-F4), (2) the maximum of F3 and minimum of F4 or F5, (3) the clustering of F3-F4-F5, and, (4) the variability of singer´s formant shape among vowels of individual psaltic voice. There are two main singer´s formants contrary to that (only one) of famous opera male singers.