| If
we divide any interval into two equal parts, the process to be done is to
multiply the numerator and the denominator of the interval by 2 and to find
the medium "vasat" number by adding half of the difference between
the big number we get and the small number. For example; let's divide 4/3
into two. We get numbers of 4x2=8 and 3x2=6 and these are the big and the
small sides. For the medium number we add 1 which is half of 2, the difference
of 8 and 6 into the small side. This number is 7. We get the numbers of
6, 7 and 8. In this case a tetrachord is divided into two intervals as 8/7
and 7/6. |