| As
we want to subtract a small interval from a big interval, if the ratio to
be subtracted is intended to leave at the high in pitch side, firstly the
numerator of the big side and the denominator of the small side are multiplied
and then the denominators are multiplied by each other. Let's subtract 3/2
from 4/3. It is 3x3=9, 3x2=6. We multiply 2 by 4 for the vasat number. We
get the numbers of 9, 8, and 6 which is a process when we want 9/8 to leave
at the high in pitch side. Here, 9/8 is at the high in pitch and 4/3 ratio
which exists between 8 and 6 is left at the low in pitch side. If we want
to leave the ratio to be obtained at the low in pitch side, in this case
we multiply the denominators by each other. The result is 12. As it is seen,
the ratio of 9/8 which is between the numbers of 12, 9, 8 is at the low
in pitch side. (7) |