Musicologists who have analyzed Sri Thyagaraja’s collected works say that his 700 odd known kritis feature 212-5 ragas (including about 47 Melakarta Ragas); and of these , as many as 121 ragas have only one composition each.
31.2. It is also said; Sri Tyagaraja seemed to favour Ragas with Suddha-madhyama (Ma1). More than a hundred of his Kritis are in groups of Ragas under Kharaharapriya, Harikambhoji and Dhira-Sankarabharanam. Then, under Prati-madhyama (Ma2), there are kritis in: Varali (14); Kalyani (21) and Pantuvarali (13).
-------------------------------------------------
Manasollasa (also called Abhjilashitarta Chintamani) ascribed to the Kalyana Chalukya King Someshwara III (1127-1139 AD) is an encyclopedic work, written in Sanskrit, covering a wide range of subjects. Its Chapter Three: Prakirnaka: deals with topics such as: Guna–Dosha (merits and demerits) of Vak-geya-kara (composers who set songs to music). The text grades the composers (Vak-geya-kara) into three classes. According to its classification, the lowest is the lyricist; the second is one who sets to tune the songs written by others; and, the highest is one who is the Dhatu Mathu Kriyakari – who writes the lyrics (Mathu), sets them to music (Dhatu) and ably presents (Kriyakari) his compositions.
The sublime trinity of Karnataka Sangita : Sri Tyagaraja; Sri Dikshitar and Sri Shyama Shastry were indeed Vak-geya-karas of the highest order.
----------------------------------------------
34.1. Telugu is mainly the language of Tyagaraja-kritis. However, out of his 700 and odd Kritis that are known, about 50 are in Sanskrit [E.g. Jagadānanda kārakā (Naata); Śhambhō mahādēva (Pantuvarali); Īśā pāhimāṃ jagadīśha (Kalyani); Lalitē śrī pravrddhē śrīmati lāvaṇya nidhimati (Bhairavi); Vara-līla gāna-lōla sura-pāla (Sankarabharanam) and many others]. It is said; for the purpose of his daily worship, Sri Tyagaraja wrote Divya-nama-sankeerthanams as also Namavalis in Sanskrit. Besides, in two of his plays –Naukacharitram and Prahlada Bhakti Vijayam – some slokas are in Sanskrit. All his Telugu songs are replete with Sanskrit words and phrases.
34.2. His early education was in Sanskrit. He seemed to have learnt it well; and he used his learning with flair. His first (!) composition Namo Namo Raghavaya (Desikatodi – a Janya raga of the 8 Melakarta Hanumatodi with Aroha – S G2 M1 P D1 N2 S/ and, Avaroha– S N2 D1 P M1 G2 R1 S ), which is inscribed on the walls of his house, is in Sanskrit. The song celebrates the glory of the Lord in brisk series of His sacred–names (Divya-nama); and also pays tributes to the Valmiki who composed the most wonderful Ramayana epic (Satatha paalita adbhuta kavye).