Damal Krishnaswamy Pattammal ( 28 March 1919 – 16 July 2009) was an Indian Carnatic musician and a playback singer for film songs in many Indian languages.
 She along with her contemporaries M. S. Subbulakshmi and M. L. Vasanthakumari were (and still are) popularly referred to as the "Female trinity of Carnatic Music".
 This trio initiated the entry of women into mainstream Carnatic Music.
 She has been appreciated all over the world by Carnatic music lovers.
S. Sowmya (born April 16, 1969) is a Carnatic music singer.
 She learnt music initially from her father Dr. Srinivasan, and later from Dr. S. Ramanathan and Smt.
T. Muktha.
 In 1998, Sowmya co-founded Carnatica - an institution dedicated to classical music & dance instruction, archival, talent search and other related activities.
 She also co-authored the first comprehensive reference CD-ROM on Carnatic music, Nadanubhava.
 She is also a visiting professor at the Advanced School of Carnatic Music of the Music Academy Madras.
K. P. Kittappa Pillai (May 5, 1913 – 1999) was the son of Sangita Kalanidhi Sri K. Ponniah Pillai, a scion of the famous Tanjore Quartet, codifiers of the Bharatanatyam format.
 Those celebrated brothers were born into a nattuvanar family and were trained in music by Sri Muthuswami Dikshitar.
 They went on to become asthana vidwans in the various South Indian courts.
 Chinniah (b. 1802) took bharathanatyam to the Wodeyar court at Mysore; Ponniah (b. 1804) and Sivanandam (b. 1808) stayed in Tanjavur, under Maratha patronage; and Vadivelu (b. 1810), who adapted the violin for use in Carnatic music, also created the form of Mohiniattam at the request of the Maharaja of Travancore, Swati Tirunal.
 The brothers codified the basic bharathanatyam adavus, developed the margam (from alarippu to tillana) as we know it today, composed an impressive number of alarippus, jatiswarams, kavituvams, sabdams, varnams, padams, javalis, kirtanais, and tillanas and in brief, transformed both the temple and court presentation of sadir, as this form was then known.
Dr. Annavarapu Ramaswamy (born 23 March 1926) is an Indian Classical Carnatic Violin Vidwan and Guru, whose musical journey entered into 9th decade.
 He is in the fourth line of direct disciples in Guru Shishya parampara of the Great Musician Saint Thyagaraja and is a disciple of Sri Parupalli Ramakrishnayya Pantulu.
 Both, Dr.M.Balamuralikrishna and him are very close friends, companions, classmates, learned carnatic music under the same guru Sri Parupalli Ramakrishnayya Pantulu.
 They performed many concerts together throughout the world.
 Many stalwarts in carnatic music, wanted and appreciated him as an accompaniment in their concerts in yesteryears.
 He accompanied top ranked legendary stalwart musicians of India, carnatic musicians such as his guru, Sri Parupalli Ramakrishnayya Pantulu,  Dr. Mangalampalli Balamurali Krishna, Sri Arayakudi Ramanuja Iyyengar, Sri Chembai Vaidyanatha Bhagavatar, Sri G. N. Balasubramaniam, Sri Semmamgudi Srinivasa Iyyer, T. R. Maralingam, Sri S.Balachandar etc..
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; and Hindustani Musicians - Pandit Vinayakarao Pathvardhan, Pandit Bhimsen Joshi, Pandit Jasraj, etc., on many Prestigious National and International venues.
 He came up with his own style of performing solo concerts on Violin & Viola.
 He invented new Ragas & Talams such as Vandana Ragam, SriDurga Ragam and Tinetradi Tala and Vedadi Tala.
 He had written and composed many Varnams and Kritis.
 He is a notable guru, taught many students, who are in successful positions such as Violin Vasu, Flute Phani, V.L.Tulasi Viswanath (carnatic vocalist), Peravali Nanda Kumar (Violinist), etc., For the past 7 to 8 decades, he has been doing free service to the society such as teaching students at free of cost.
 He propagated the magnificence of his performances, teachings, demonstrations and Lectures on Music in countries such as U. S. A, Canada, European Countries (U. K, France etc.) and Asian Countries (Muscat, Bahrain, Dubai, Singapore, Malaysia, Doha, Srilanka, etc.,)
Namagiripettai K Krishnan (2 April 1924 – 2 April 2001) was a Carnatic musician who played the Nadaswaram.
 He was born in Namagiripettai village and lived in Sendamangalam, Namakkal district, Tamil Nadu, India.
 He gave many performances across the country.
 In 1981, Krishnan was awarded the Padma Shri by the Indian government for his contributions to Carnatic music.
 He was also the "Asthana Sangeetha Vidwan" for the Tirumala Venkateswara Temple.
Eduardo Mace (Elichirigoity), born September 1966 in Brazil, is an Anglo-Brazilian entrepreneur, multimedia software pioneer, developer, editor and multimedia author.
 His multimedia businesses were active in Brazil from 1989 until 2013 and contributed to the formation of the digital media market, having developed - through his company ATR Multimedia - the first multimedia software available in Brazil (1990), the first reference CD-ROM with Almanaque Abril (Editora Abril) in 1994, the first Brazilian board and adventure games (Master Multimídia and Casseta & Planeta: Noite Animal) in 1995.
Asthana Vidushi is an honorary title bestowed to a court musician or dancer in India.
 Notable Asthana Vidushis include Bangalore Nagarathnamma, M. S. Sheela, Bombay Sisters, Geetha Raja, as well as Srirangam Gopalaratnam, Shobha Raju, and S. Sowmya.
The Jazz Discography is a print, CD-ROM, and online discography and sessionography of all categories of recorded jazz — and direct relevant precursors of recorded jazz from 1896.
 The publisher, Lord Music Reference Inc., a British Columbia company, is headed by Tom Lord and is based in Chilliwack, British Columbia, Canada.
 The initial 26 of 35 print volumes, which comprise the discography, were released from 1992 to 2001 in alphabetic order.
 In 2002, "The Jazz Discography" became the first comprehensive jazz discography on CD-ROM.
Purandara Dāsa (Kannada: ಪುರಂದರ ದಾಸ ) (1484–1564) was a Haridasa (a devotee - servant of Lord Hari (Vishnu)), great devotee of Lord Krishna (an incarnation of Lord Vishnu) and a saint.
 He was a disciple of the celebrated Madhwa philosopher-saint Sri Vyasatirtha, and a contemporary of yet another great Haridasa, Kanakadasa.
 His Guru, Sri Vyasatirtha himself glorified Purandara Dasa in a song thus: "Dāsarendare purandara dāsarayya" (ದಾಸರೆಂದರೆ ಪುರಂದರ ದಾಸರಯ್ಯ).
 Purandara Dasa was a composer, singer and one of the chief founding-proponents of the South Indian classical music (Carnatic Music).
 In honor of his significant and legendary contributions to Carnatic Music, he is widely referred to as the "Pitamaha" ("lit", "father" or the "grandfather") of Carnatic Music.
 He is respected as an "avatara" (incarnation) of the great sage Narada (a celestial being who is also a singer).
The nottuswara or "nottu swaras" compositions (from "note swaras") are a set of 39 compositions in Carnatic classical music by Muthuswami Dikshitar (18th century), who was one of the three early composers celebrated as the Trinity of Carnatic music.
 They are notable as an interaction between the East and the West during Company rule, being based on Western sources, mostly simple melodies inspired by Scots and Irish tunes.
 They are all composed with Sanskrit lyrics in the Western C major scale, whose pitch intervals correspond to that of the Shankarabharana raga scale in Carnatic music, or the Bilaval that of Hindustani music.
 Technically, the compositions are not in Shankarabharana proper, being based on simple melodies and devoid of the ornamentation ("gamaka") that is characteristic of Carnatic music.
 On the other hand, the lyrics ("sahitya") of these compositions are entirely Indian and consistent with the rest of the "stotra"-literature, or other songs addressed to similar deities.

Question: Which singer who co-authored the first comprehensive reference CD-ROM on Carnatic music is also a notable Asthana Vidushi?
Answer: S. Sowmya