Structures of the thaalams
The table below shows the structures of the 7 thaalams. The number of aksharams in the Laghu is decided by the Jaathi.
Each thaalam has a normal ('default') jaathi and when jaathi is not mentioned
the normal jaathi is implied. For jaathis other than the normal jaathi of a
thaalam the jaathi has to be mentioned.
[Laghu - beat followed by counts to complete number of aksharams of the jaathi]
[Dhrutham - beat and wave = 2 aksharams. Anudhrutham - beat = 1 aksharam]
| Thaalam Name ||Thaalam Structure || Normal Jaathi || Aksharams for normal Jaathi
|Dhruva ||Laghu, Dhrutham, Laghu, Laghu || Chathusra ||4+2+4+4 = 14
| Matya ||Laghu, Dhrutham, Laghu || Chathusra|| 4+2+4 = 10
| Roopaka ||Dhrutham, Laghu || Chathusra || 2+4 = 6
|Jampa ||Laghu, Anudhrutham, Dhrutham || Misra||7+1+2 = 10
| Thriputa||Laghu, Dhrutham, Dhrutham ||Thisra ||3+2+2 = 7
|Ata ||Laghu, Laghu, Dhrutham, Dhrutham ||Khanda ||5+5+2+2 = 14
|Eka ||Laghu || Chathusra ||4
Thus Ata Thaalam without mention of jaathi would mean Khanda Jaathi Ata thaalam; for other jaathis of Ata thaalam we have to mention the jaathi. Aadhi
thaalam is actually Chathusra Jaathi Thriputa (Laghu 4, Dhrutham 2, Dhrutham 2 = 8 - not the default for Thriputa). The
order in which the thaalams are mentioned above is used historically ( ex- for
Alankaarams in beginner' s lessons). The Alankaarams use the default jaathi's and so we do not find Aadhi thaalam in them.
Dheekshithar composed the first 7 Navagraha Krithis starting from Sooryamoorthe (on Sun) in these seven
thaalams and in that order.