Making The First 16 Thaats with 8 Tetrachords:

In the last post we saw that there are 4 poorvang Tetrachords and 4 Utrang Tetrachords.

By combining the upper and the lower Tetrachords, we can get 16 (4×4) unique scales.

The scale structure will be as shown below:

		Tetrachord Number
		Poorvang		Utrang
Thaat Names					Vikrat
1. Bilaval		1	+	1	none
2. Sarsangi		1	+	2	‘d’
3. Khamaj		1	+	3	‘n’
4. Charukeshi		1	+	4	‘d’, ‘n’
5. Suryakant		2	+	1	‘r’
6. Bhairav		2	+	2	‘r’,'d’
7. Chakarvak		2	+	3	‘r’,'n’
8. Bakulabharan		2	+	4	‘r’, ‘d’, ‘n’
9. Gauri Manohari		3	+	1	‘g’
10. Kirvani		3	+	2	‘g’,'d’
11. Kafi		3	+	3	‘g’,'n’
12. Asavari		3	+	4	‘g’, ‘d’, ‘n’
13. Kokilpirya		4	+	1	‘r’, ‘g’
14. Dhenuka		4	+	2	‘r’, ‘g’,'d’
15. Natakpirya		4	+	3	‘r’, ‘g’, ‘n’
16. Bhairavi		4	+	4	‘r’, ‘g’, ‘d’, ‘n’

The scales will look as shown below:

1. Bilaval:

Bilaval is the combination of Bilaval Tetrachords from the both sides (1+1).

1. Bilaval
	1. S R G m	+1. P D N S*

2. Sarsangi:

Sarsangi is the combination of Bilaval & Sarsangi Tetrachords (1+2).

2. Sarsangi
	1. S R G m	+2. P d N S*

3. Khamaj:

Khamaj is the combination of Bilaval & Khamaj Tetrachords (1+3).

3.. Khamaj
	1. S R G m	+3. P D n S*

4. Charukeshi:

Charukeshi is the combination of Bilaval & Charukeshi Tetrachords (1+4).

4. Charukeshi
	1. S R G m	+4. P d n S*

5. Suryakant:

Sutyakant is the combination of Surykant & Bilaval Tetrachords (2+1). Suryakant is also known as Anand Bhairav.

5. Sutyakant
	2. S r G m	+1. P D N S*

6. Bhairav:

Bhairav is the combination of Surykant & Sarsangi Tetrachords (2+2).

6. Bhairav
	2. S r G m	+2. P d N S*

7. Chakarvak:

Chakarvak is the combination of Surykant & Khamaj Tetrachords (2+3). Chakarvak is also known as Ahir Bhairav.

7. Chakarvak
	2. S r G m	+3. P D n S*

8. Bakulabharan:

Bakulabharan is the combination of Surykant & Charukeshi Tetrachords (2+4).

8. Bakulabharan
	2. S r G m	+4. P d n S*

9. Gauri Manohari:

Gauri Manohari is the combination of Gauri Manohari & Bilaval Tetrachords (3+1).

9. Gauri Manohari
	3. S R g m	+1. P D N S*

10. Kirvani:

Kirvani is the combination of Gauri Manohari & Sarsangi Tetrachords (3+2).

10. Kirvani
	3. S R g m	+2. P d N S*

11. Kafi:

Kafi is the combination of Gauri Manohari & Khamaj Tetrachords (3+3).

11. Kafi
	3. S R g m	+3. P D n S*

12. Asavari:

Asavari is the combination of Gauri Manohari & Charukeshi Tetrachords (3+4).

12. Asavari
	3. S R g m	+4. P d n S*

13. Kokilpirya:

Kokilpirya is the combination of Kokilpirya & Bilaval Tetrachords (4+1).

13. Kokilpirya
	4. S r g m	+1. P D N S*

14. Dhenuka:

Dhenuka is the combination of Kokilpirya & Sarsangi Tetrachords (4+2). Dhenuka is also known as Pilu.

14. Dhenuka
	4. S r g m	+2. P d N S*

15. Natakpirya:

Natakpirya is the combination of Kokilpirya & Khamaj Tetrachords (4+3).

15. Natakpirya
	4. S r g m	+3. P D n S*

16. Bhairavi:

Bhairavi is the combination of Kokilpirya & Charukeshi Tetrachords (4+4).

16. Bhairavi
	4. S r g m	+4. P d n S*

Please note that all these Thaats have ‘Komal Madhyam’. Which is also know as Natural Fourth or Shudh Madhyam.
Making the rest of the 16 Thaats is easy now. Just change the Madhyam to Tivar in all the above. We will talk about those in the next post.

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