Ostinato - Indian Classical Music

Indian Classical Music

In Indian classical music, during Tabla or Pakhawaj solo performances and Kathak dance accompaniments, a conceptually similar melodic pattern known as the Lehara (sometimes spelled Lehra) or Nagma is played repeatedly throughout the performance. This melodic pattern is set to the number of beats in a rhythmic cycle (Tala or Taal) being performed and may be based on one or a blend of multiple Ragas.

The basic idea of the lehara is to provide a steady melodious framework for rhythmic improvisations. It serves as an auditory workbench not only for the soloist but also for the audience to appreciate the ingenuity of the improvisations and thus the merits of the overall performance. In Indian Classical Music, which is drawn from the ancient vedic traditions, the concept of 'Suum' (pronounced as 'sum') carries paramount importance. The Suum is the target unison beat of any rhythmic cycle. The second most important beat is the Khali, which is a complement of the Suum. Besides these two prominent beats, there are other beats of emphasis in any given taal, which signify 'khand's (divisions) of the taal. E.g. 'Roopak' or 'Rupak' taal, a 7-beat rhythmic cycle, is divided 3–2–2, further implying that the 1st, 4th, and 6th beats are the prominent beats in that taal. Therefore it is customary, but not essential, to align the lehara according to the divisions of the Taal. It is done with a view to emphasize those beats that mark the divisions of the Taal.

The lehara is usually played on the Harmonium, Sarangi or even the Violin. The playing of the lehara is relatively free from the numerous rules and constraints of 'Raga Sangeet', which are upheld and honoured in the tradition of Indian Classical Music. The lehara may be interspersed with short and occasional improvisations built around the basic melody. It is also permissible to switch between two or more disparate melodies during the course of the performance. It is essential that the lehara be played with the highest precision in Laya(Tempo) and Swara control; which requires years of specialist training (Taalim) and practice (Riyaaz). It is considered a hallmark of excellence to play lehara alongside a recognised Tabla or Pakhawaj virtuoso. While there may be scores of individually talented instrumentalists, there are very few who are capable of playing the lehra for a Tabla / Pakhawaj solo performance.

Other instruments like Sitar and Sarod have also been used to play the lehara, but very sparingly. E.g. Pandit Ravi Shankar has played a 12 beat lehara on the Sitar for Ustad Allah Rakha during his solo performance in 1967 at the Monterey Music Festival. Similarly Ustad Ali Akbar Khan has played numerous leharas on the Sarod with Pandit Mahapurush Mishra. There may be other notable artists who may have also played the lehara on other unconventional instruments like Santoor, Shehnai, Bamboo Flute, Mohan Veena, etc.