Composers of Carnatic music were often inspired by religious devotion and were usually scholars proficient in one or more of the languages Kannada, Malayalam, Sanskrit, Tamil, or Telugu. They usually included a signature, called a mudra, in their compositions. For example, all songs by Tyagaraja (who composed in Telugu) have the word Tyagaraja in them, all songs by Muthuswami Dikshitar (who composed in Sanskrit) have the words Guruguha in them; songs by Syama Sastri (who composed in Telugu) have the words Syama Krishna in them; all songs by Purandaradasa (who composed in Kannada) have the words Purandara Vittala; while Gopalakrishna Bharathi (who composed in Tamil) used the signature Gopalakrishnan in his compositions.
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