start:
09 january 2007, update: 09 january 2007


Rather
than these some other kinds in octave can be arranged. Safi alDîn
explains this with an example. Let's take the scale arranged with the
intervals of "the second conjunct kind" in the bass octave.

The
order of 9/8x10/9x16/15=4/3 here is the ratios of "the second conjunct
kind" with those of the first class. The third class of the same
kind is like 10/9x16/15x9/8=4/3. This third class here exists between
B and h. As it is mentioned here it is possible to see several more tetrachords
in this way in these scales. Safi alDîn calls them "bahr".
The tetrachord between B and h here is accepted as "second bahr". Also, CV tetrachord is the ratios of "the second conjunct kind" with its sixth class and it is called as the "third bahr" in the scale. DZ tetrachord is the "fourth bahr" and the ratios are the same as those of the first one. hH tetrachord has the same values as those of the second tetrachord. Safi alDîn calls the total of these bahr (tetrachordal species) in one octave as "shadd". 