An important form of vocal music that mainly relies on meaningless words/sound-syllables is tarana. The form consists of sound-syllables used to describe sounds produced by string instruments or drums (tana, dere, na, etc.) to create a composition in a raga. The tempo is generally medium or fast, and the composition has two parts in the sthayi and the antara respectively. The form is not restricted to any particular raga or tala.
Tradition credits Amir Khusro (1253-1325) with having invented the form. He is said to have combined Farsi Rubai and sounds without meaning. It may be recalled that in India there has been a long tradition to use meaningless sounds in music.