Narapatijayacarya 3.1.3.6-2

On "beginning with 'a'": here, from the statement of Śrīpati, "From the transit of the Sun through pairs of zodiacal signs beginning with Capricorn, the six seasons occur: winter and spring, summer, the rains, and likewise autumn; the sixth here is called the cold season," from the transit of the Sun through Capricorn and the others, the six seasons, winter and so forth, occur. In those six seasons are the twelve zodiacal signs. It is well known that a zodiacal sign consists of thirty degrees. Thus, in the six seasons there are three hundred and sixty degrees, and therein are the five sounds. Therefore, in each single sound there are seventy-two degrees. Since the period of the Sun's transit for one day is one degree, the transit period of a single sound is stated to be seventy-two days.

The season sound diagram:

a, i, u, e, o

Pisces, Taurus, Cancer, Libra, Sagittarius

Aries, Gemini, Leo, Scorpio, Capricorn

Taurus, Cancer, Cancer, Sagittarius, Aquarius

6 6 6 6 6

32 32 32 32 32

43 43 43 43 43

Now, the month sound diagram: