Geetam
Geetam, (Sanskrit: गीतम्; gītaṃ) the simplest music form in Carnatic music, was created by Purandara Dasa in order to introduce "talas" with "sāhityaṃ" (lyrics). Gītaṃ literally means "song" in Sanskrit. Structure. A gītaṃ is a simple devotional melody song with same tempo throughout the song. There is no "anga" change, repetition and Sangati in gītaṃ. Gītaṃs usually have 10/12 avarthanams. Though gītaṃs have no absolutely defined divisions of pallavi, anupallavi or charanas, they may be observed in some cases. Some gītaṃs contain sections rather than the defined divisions (pallavi etc.). They often have no sangatis or variations, with each  swara taking one syllable of the sahitya. The gītaṃ is sung without repetition from the beginning to end. However most gītaṃs are concluded by repeating a portion of the opening part. Gītaṃs are set in medium tempo and contain no "saṃgatis" or variations and the flow of the music is natural. The theme of the "sāhityaṃ" (lyrics) is to praise God. Students learn these gītaṃs after attaining a course in the preliminary saraḷī svarās and alaṃkārās. Types of gītaṃs. There are three types of gītaṃs in Carnatic music tradition: