T. M. Thiagarajan was awarded the title to an expert in what discipline by the Madras Music Academy?
T. M. Thiagarajan:  He was awarded the Madras Music Academy's Sangeetha Kalanidhi in 1981. Sangeetha Kalanidhi: Sangeetha Kalanidhi or Sangita Kalanidhi (Sanskrit: saṅgītakalānidhi ) ("sangeetha" = music, "kala" = art, "nidhi" = treasure) is the title awarded yearly to an expert Carnatic Musician by the Madras Music Academy.
Carnatic Musician