|Developed||First mentioned in Hindu literature: Lord Nandi first played this instrument for Lord Shiva. Lord Senthilgiri played it second.|
The mridangam (Sanskrit: मृदङ्गम्, Tamil: தண்ணுமை, Telugu: మృదంగం, Kannada: :ಮೃದಂಗ, Malayalam: മൃദംഗം, Nepal Bhasa: मृदङ्ग) is a percussion instrument from India of ancient origin. It is the primary rhythmic accompaniment in a Carnatic music and Newa music ensemble. Alternate spellings include "mrudangam", "mrdangam", "mrithangam", "miruthangam", and "mirudhangam".
The mridangam is also played in Carnatic concerts in countries outside of India, including Sri Lanka, Singapore, Malaysia, Australia, United Kingdom, Canada, and the United States. During a percussion ensemble, the mridangam is often accompanied by the ghatam, kanjira, and the morsing.
In ancient Hindu sculpture, painting, and mythology, the mridangam is often depicted as the instrument of choice for a number of deities including Ganesha (the remover of obstacles) and Nandi, who is the vehicle and companion of Shiva. Nandi is said to have played the mridangam during Shiva's primordial tandava dance, causing a divine rhythm to resound across the heavens. The mridangam is thus also known as "deva vaadyam," or "instrument of the gods."
The word "mridangam" is derived from the two Sanskrit words mŗda (clay or earth) and anga (body), as early mridangams were made of hardened clay. Over the years, the mridangam evolved to be made of different kinds of wood due to its increased durability, and today, its body is constructed from wood of the jackfruit tree. It is widely believed that the tabla, the mridangam's North Indian musical counterpart, was first constructed by splitting a mridangam in half. With the development of the mridangam came the evolution of the tala (rhythmic) system. The system of talas (or taalams) in South Indian Carnatic music may be the most complex percussive rhythm system of any form of classical music.
Tamil culture 
In Tamil culture, it is called a tannumai. The earliest mention of the mridangam in Tamil literature is found perhaps in the Sangam literature where the instrument is known as 'tannumai'. In later works like the Silappadikaram also we find detailed references to it as in the Natyasastra. During the Sangam period, It was one of the principal percussion instruments to sound the beginning of war along with முரசு, muracu, துடி, tuṭi and பறை, parai because it was believed that its holy sound will deflect enemy arrows and protect the King. During the post-Sangam period, as mentioned in the epic Cilappatikaram, it formed a part of the அந்தரக்கொட்டு, antarakoṭṭu - a musical ensemble at the beginning of dramatic performances that would later develop into Bharathanatyam. The player of this instrument held the title தண்ணுமை அருந்தொழில் முதல்வன், tannumai aruntozhil mutalvan.
The mridangam is a double-sided drum whose body is usually made using a hollowed piece of jackfruit wood about an inch thick. The two mouths or apertures of the drum are covered with a goatskin and laced to each other with leather straps around the circumference of drum. These straps are put into a state of high tension to stretch out the circular membranes on either side of the hull, allowing them to resonate when struck. These two membranes are dissimilar in width to allow for the production of both bass and treble sounds from the same drum.
The bass aperture is known as the thoppi or eda bhaaga and the smaller aperture is known as the valanthalai or bala bhaaga. The smaller membrane, when struck, produces higher pitched sounds with a metallic timbre. The wider aperture produces lower pitched sounds. The goat skin covering the smaller aperture is anointed in the center with a black disk made of rice flour, ferric oxide powder and starch. This black tuning paste is known as the satham or karanai and gives the mridangam its distinct metallic timbre.
The combination of two inhomogeneous circular membranes allows for the production of unique and distinct harmonics. Pioneering work on the mathematics of these harmonics was done by Nobel Prize winning physicist C. V. Raman.
Methods of use 
Immediately prior to use in a performance, the leather covering the wider aperture is made moist and a spot of paste made from rice flour and water is applied to the center, which lowers the pitch of the left membrane and gives it a very powerful resonating bass sound. The artist tunes the instrument by varying the tension in the leather straps spanning the hull of the instrument. This is achieved by placing the mridangam upright with its larger side facing down, and then striking the tension-bearing straps located along of circumference of the right membrane with a heavy object (such as a stone). A wooden peg is sometimes placed between the stone and the mridangam during the tuning procedure to ensure that the force is exerted at precisely the point where it is needed. Striking the periphery of the right membrane in the direction toward the hull raises the pitch, while striking the periphery from the opposite side (moving away from the hull) lowers the pitch. The pitch must be uniform and balanced at all points along the circumference of the valanthalai for the sound to resonate perfectly. The pitch can be balanced with the aid of a pitch pipe or a tambura. The larger membrane can also be tuned in a similar manner, though it is not done as frequently. Note that since the leather straps are interwoven between both the smaller and larger aperture, adjusting the tension on one side often can affect the tension on the other.
The mridangam is played resting it parallel to the floor. A right-handed mridangam artist plays the smaller membrane with his or her right hand and the larger membrane with the left hand. This can be described in words as follows: The mridangam rests upon the right foot and ankle, the right leg being slightly extended, while the left leg is bent and rests against the hull of the drum and against the torso of the artist. For a left-handed percussionist, the legs and hands are switched.
There is also a parallelounds of the mridangam. Students of this art are required to learn and practice both the fingering strokes taught as the training becomes more advanced, which are generally used as aesthetic embellishments while playing. These notes are im, and chaapu. The combination of these finger strokes produces complex mathematical patterns.
Basic strokes on the mridangam:
- Tha: Non-vibrating tone played on the left hand side.
- Thi: Non-vibrating tone played on the centre black portion of the right hand side using middle, ring and small fingers.
- Thom: Vibrating tone played on the outer side of the left hand side.
- Nam: Vibrating tone played on the outer layer of the right hand side using index finger, minimizing the black portion vibration with middle or ring finger- place the third finger in the gap in ring and the second finger hits the outer layer of the right hand side of the Miruthangam ( called 'Saatham').
- Ta: A sharp flat note played with the index finger in the middle of the black portion on the right side of the mridangam.
- Gumukki: Bass tone produced by playing on the inner layer of the lower end of the left hand side. Sound is produced only when there is a special applied paste.
- Full Chapu: It is a vibrating tone played with the small finger on the right hand side, between the black patch and the outer layer. The sound is tuned to the tonic of the tambura.
- Ara Chapu: A note similar to Chapu, but is an octave higher, and is played with the side of the hand and less of the pinky.
- Dheem: A vibrational tone version of Thi
Modern usage 
Today the mridangam is most widely used in Carnatic music performances. These performances take place all over Southern India and are now popular all over the world. As the principle rhythmic accompaniment (pakkavadyam), the mridangam has a place of utmost importance, ensuring all of the other artists are keeping their timing in check while providing support to the main artist. One of the highlights of a modern Carnatic music concert is the percussion solo (thani avarthanam), where the mridangam artist and other percussionists such as kanjira, morsing, and ghatam vidwans exchange various complex rhythmic patterns, culminating in a grand finale where the main artists resumes where he or she left off.
Mridangam is used as an accompanying instrument in Yakshagana Himmela (orchestra) where it is called Maddale. However, Mridangam used in Yakshagana is markedly different in structure and acoustics from the ones used in Carnatic music.
Significant players of the mridangam in modern times are Dr.T.K.Murthy, Umayalapuram K. Sivaraman, Vellore Ramabhadran, Trichy Sankaran, B. Harikumar, Karaikudi Mani, Madurai.T.Srinivasan(Seenakutti),Yella Venkateswara Rao, Srimushnam Raja Rao, Tiruvarur Bhaktavatsalam, Mahadevu Lakshmi Narayana Raju, Cheluvaraj Trichur C Narendran who have been playing and advancing the technique since decades.
Over the years and especially during the early 20th century, great maestros of mridangam also arose, inevitably defining "schools" of mridangam with distinct playing styles. Examples include the Puddukottai school and the Thanjavur school. The virtuosos Palani Subramaniam Pillai, Palghat Mani Iyer, C.S. Murugabhupathy and [Late Sri Mahadevu Radha Krishna Raju] contributed so much to the art that they are often referred to as the Mridangam Trinity.
There is also another style i.e., the blending of Saakotai Rangu Iyengar's and Kumbakonam Azhaganambi Pillai's taught to hundreds of disciples by the legendary Late Sri Kumbakonam Narayanaswamy Iyer and late Sri Kumbakonam Rajappa Iyer.
Past players 
- Palghat R. Raghu
- Mavelikkara Krishnankutty Nair
- Mavelikkara Velukkutty Nair
- Vellore Ramabhadran
- Mahadevu Radha Krishna Raju
- T. K. Murthy
- [ Dr.T.V.Gopalkrishnan -TVG]
- Umayalpuram K. Sivaraman
- Yella Venkateswar Rao
- Vidwan M. Vasudevarao
- Guruvayur Dorai
- Karaikudi Mani
- Mannargudi Easwaran
- Trichy Sankaran
- Srimushnam V. Raja Rao
- Mahadevu Lakshmi Narayana Raju
Current players 
- Patri Satish Kumar
- Thiruppampuram R. Dhandapany
- yella venkateswararao
- Yogaraja Kandasamy
- Kodunthirappully Padrameswaran
- Mandapaka Nagalakshmi,vizyanagaram,AP
- Thiruvarur Bakthavathsalam
- Arjun Narayanan
- V.S. Rajgopal
- Pudukottai Rajagopal
- Madurai T. Srinivasan
- Thiruvananthapuram V. Surendran
- Trichur C. Narendran
- PARASSALA RAVI
- KUMMANAM V.G.HRAEENDRANATH
- AV Anand
- L Vaidhyanathan
- Kumbakonam Padmanabhan
- Neiveli Narayanan
- Changanassery Harikumar
- Lavanya Rajamani
- Bombay K. B. Ganesh
- K V Prasad
- H. S. Sudhindra
- R Vydianathan
- Anoor Anantha Krishna Sharma
- Erickavu N. Sunil
- Trivandrum Balaji
- Kumbakonam Venkatesan
- Mannarkoil J Balaji
- Arjun Kumar
- Ambathur K Babu
- Palghat A Ganesh
- Alathur PB Krishnan
- Palghat Mahesh Kumar
- Kallekulangara Unnikrishnan
- C. Cheluvaraj
- P.K. Swaminathan
- Rajna Swaminathan
- Rajesh Srinivasan [Mumbai]
See also 
- Maddale—an instrument used in Yakshagana
- Trống cơm- a similar Vietnamese instrument
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- Book: Nepalbhasa sahitya ya itihaas, Author: Prof. Premshanti Tuladhar, Publication: Nepalbhasa Academy, ISBN 99933.560.0
- Cuntaram, Pi. Em., Kalākēndra, T. (2010). Great layavadyakaaraas of Karnatak music. Percussive Art Centre.
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- Surabhi: Sreekrishna Sarma felicitation. Prof. E.R. Sreekrishna Sarma Felicitation Committee. 1983. p. 90.
- T.S. Parthasarathy. "BHARATANATYAM IN HISTORY". Carnatica.net. Retrieved 26 February 2013.
- Iḷaṅkōvaṭikaḷ, Daniélou A. (1965). Shilappadikaram: (The Ankle Bracelet). New Directions Publishing. p. 14. ISBN 0811200019.
- Viswanathan, Lakshmi (1984). Bharatanatyam, the Tamil heritage. Sri Kala Chakra Trust. p. 23.
- Tamil Studies, Volume 3. International Institute of Tamil Historical Studies. 1983. p. 36.
- Raman and Kumar 1920, Musical drums with harmonic overtones. Nature (London) 104 500, 453-454
- Raman 1935, The Indian musical drums. Proc. Indian Acad. Sci. A1 179-188
- Mannarkoil J Balaji explains about the aspects of mridangam.
- Know about tala system and about mridangam