Carnatic music has never been gharana based largely because the composers whodefined the art never attached themselves to any princely court. Importantpractitioners of the art developed what was called a bhani (or style)that was unique to each one. There was, however, a powerful gurukula systemwhereby aspiring musicians attached themselves to a Guru's household and learntmusic systematically. Even under such a system, the emphasis was on the passingdown of the songs and the manner in which they were to be sung. The extemporeelement was largely left to the disciple to develop on his own with the Gurusimply laying down the fundamental rules. The students had to decide whether toreplicate the Guru's style or develop an interpretation of the art bythemselves, thereby creating a new bhani. A classic example of this was G.N.Balasubramanian (1910-1965) or GNB as he was popularly known. The GNB bhanibecame so popular by the 1940s that it posed a serious challenge to all othermale singers. His disciple, M.L. Vasanthakumari (1928-1990) was first aperformer in the GNB mode, but later branched out with her own MLV bhani. TodaySudha Raghunathan is a top ranking performer who learnt from MLV and istherefore a representative of that style.