Tala: the cycle of musical time

The rhythmic element in a Hindustani music composition is called a Tala. Its main function is to interpret geophysical time as musical time. Like geophysical time, a Tala is also cyclical. But, as musical time, subordinated to the human aesthetic sensibility, it can be given any duration and tempo, and can also be sub-divided in a variety of ways. It can thus be imparted different cycle durations and cadential patterns. 

The art and craft of the composer arranges a convergence of these cycle durations and cadential patterns with the meter of the melodic lines, and the poetic verse (where present). This convergence of the three elements imparts to each composition its distinctive form. 

Twentieth century literature lists about 50 tala-s. However, across all genres, contemporary Hindustani music is dominated by ten to twelve Tala-s. The smallest Tala in circulation has 6 beats, while the longest has 18 beats.  The subdivisions of the Tala-s can be regular or irregular. Some Tala-s are particularly suited for slow-tempo compositions, while others are specially suited for medium or brisk tempo compositions.  A few, very few, Tala-s are versatile enough to be performed at any tempo without losing their distinctive cadential structure. 

The composition in Hindustani music

A musical composition, by its general definition, is a pre-composed musical form which integrates melodic, rhythmic and poetic elements. This definition would fit a song in any category of music, including folk, devotional, and popular. It will not, however, satisfy a composition in Hindustani music. The Hindustani tradition does not, as a  rule, deploy a composition as a stand-alone piece of performed music. Instead, the composition is required to function as the nucleus of the performance, and hold the entire performance together as a seamless piece of well organized music. 

The composition can perform this function only if it conforms to the grammar of a particular Raga, and facilitates the insertion and integration of the various improvised movements appropriate to the genre. In the context of vocal music, ideally, the literary element should also support the emotional values (Rasa) of the Raga with appropriate poetic expression.

Though rarely performed in isolation, and normally used as a melodic-rhythmic-poetic frame for the improvisatory movements, a composition of merit commands respect as an exemplary specimen of the composer’s art and craft. 

Each genre of music provides the musician with a bank of such compositions, which are composed in different Raga-s and set to rhythmic cycles appropriate to the genre, along with their prescribed tempo. Having chosen his Raga, a musician can perform either a composition from this bank, or decide to compose his own.  Most musicians accept their own limitations as composers, and find it convenient to draw upon familiar and time-tested musical material in the public domain. 

Architectural conventions in modern Hindustani music

Architectural conventions govern the sequencing of the improvisatory movements and their integration with the composition to shape the totality of the Raga presentation. The sequencing logic is based on widely accepted assumptions about human comprehension. Anyone who has been a teacher will easily recognize these principles as being equally applicable to education. 

Sequentially, the rendition begins with the slowest movements, and moves steadily towards the faster movements.  It starts from the melodically and rhythmically simpler movements, and moves towards to the more complex movements. It commences with the relatively unstructured movements in which the details are transparent, and progresses towards the more structured movements, where the detail can often get blurred.  The sequencing of movements is exponential in terms of density and complexity.

Complexity is a self-evident term. But, what do we mean by density? In melody, it is measured by the number of explicit intonations per second. In rhythm, it will mean number of beats per second. The density of the overall musical experience can be visualized in terms of sound-bytes delivered per second.

Within each movement, the melody undergoes a cyclical treatment. Why should there be any prescribed pattern?  To begin with, art music has to be disciplined. In the process of providing ample scope for individual creativity, it cannot permit any facet of it to be random or whimsical. The melodic framework of a Raga is the primary emotional trigger, and has to be given complete scope for performing this function. The minimum condition for this is that the exploration of the Raga must go through ascending, descending and valedictory motions through two octaves in the major – if not all – movements in order to release its emotional charge inherent in the melodic framework.

Schematic representation of architectural conventions

This combination of exponential sequencing of movements and cyclical melodic formations within each movement will be easier to appreciate with a schematic representation.

It will be observed in the graph that there 

 is an exponential trend-line representing the density and complexity. Running through it is a cyclical wave pattern representing the melodic path. 

This model is verifiable by a systematic plotting of melodic and rhythmic trends in a modern Hindustani music performance. Raga-based music in the medieval Dhrupad-Dhamar genre would need to be represented by a different architectural model. 

The principal genres of Hindustani music

An art music tradition supports various genres of music. Each genre has its own history, geography and specificity. But, for the purposes of comprehension, a genre is defined primarily by its architectural features. There are two aspects to understanding the architecture of a musical genre: First is that of understanding its subordinate forms and their movements, and the second, the sequencing of the movements within the subordinate forms.

Hindustani art-music, as performed, can be compared to the telling of a story through the interpretation of a Raga. Movements in a genre of Raga-based music may be compared to the chapters in a book, or acts and scenes in a play. In music, each movement progresses the “story” by the distinctive way in which it crafts the interaction between melody, rhythm and poetry (in the case of vocal music). The sequencing of the movements determines the build-up and release of aesthetic tension in a piece of art music, just as chapters in a novel, or acts in a play, are sequenced to achieve the aesthetic impact of the story-telling.  

In literature, we know that a novel, a short story, a cinema script, and a play, will tend to build and release the tension of the story line in different ways. And this, of course, is why each of them has its own place in the world of literature. Likewise, there are different genres in art music because they deliver different qualities of aesthetic experience. 

On the contemporary art music platform, a listener is likely to encounter the following genres. 

1. Dhrupad (along with its companion sub-genre, Dhamar): This was the dominant genre of vocal and instrumental art music between the 15th and 18th centuries. 

2. Khayal:  This genre began evolving in the 13th century as a fusion of older Indian musical genres and Middle Eastern influence, and began to replace Dhrupad as the dominant genre of vocal music from the 18th century. The Khayal remains, to this day, the dominant vocal genre, with a significant presence also in the music of the bowed and wood-wind instruments. 

3. Thumree: This genre originated as an accompaniment to Kathak (North Indian) dance. The Thumree evolved as a  genre of solo vocal music from the 18th century and retained a significant presence till the middle of the 20th century. As a genre of vocal music, it could not survive the transition from the intimacy of its original milieu to the impersonal  atmosphere of the modern concert hall.  Its manifestation in instrumental music has, however, remained stable. 

4. The modern genre of plucked instruments: This genre is heard primarily on the plucked lutes – Sitar, Sarod, Hawaiian guitar. Their idiom has also been adopted by the percussive-melodic Santoor, the most recent entrant into art-music from folk traditions. Because of the dominance of the plucked string instruments in contemporary music, their idiom is also influencing the wood-wind and bowed instruments. This genre combines elements of the medieval Dhrupad genre, with post-Dhrupad modes of presentation. 

Note:  Of the above four, the Thumree is a borderline case of a Raga-based genre. Its melody is rooted predominantly in the Raga pantheon. But, the musician is allowed considerable liberty in observing the rules of Raga grammar. In addition, the melodic resource of the genre includes folk melodies, which cannot qualify as Raga-s.