The
raga and the
tala are the basic building blocks of any classical Indian piece of music. These mainly affect the melody (
raga) and rhythm (
tala). But the approach to other basic elements of music - form, tuning, harmony, texture, timbre, and improvisation versus composition - are also quite different from Western music. Here is a short, basic comparison of each element of the two musics.
Improvisation
Unlike most
Western "classical" music, most Indian classical music is improvisational. The musician chooses a
raga and a
tala. These provide a basis for the musician to improvise a solo. This is a little similar to the way the
chord progression and the background provided by the the rhythm section of a jazz band give the jazz soloist the basis to improvise a solo. Of course, both the basis and the rules for improvising are different from jazz, so the results also sound very different.
Melody and Mood: The Raga
The
melodies and
harmonies in Western music are based on
major and
minor scales. Major-key melodies and harmonies are different from minor-key melodies and harmonies, but the same melody and
chord progression can be easily
transposed from one major key to a different major key, or from one minor key to a different minor key. Of course, some Western music is
modal, and some uses pentatonic, blues, twelve-tone, or
other scales, but the vast majority of the music can be classified as major or minor.
The melodies of Indian music are based on
ragas (in southern India,
ragam). Like a scale, the
raga is a list of the notes that are used in a particular piece of music. But there are many more
ragas than there are scales - hundreds - and the various
ragas are much more different from each other than the various scales are. The number of notes used, the
intervals between the notes, and even the
tuning, can be different from one
raga to the next. Because of these differences, the rules for constructing melodies are also different in different
ragas, and so the melodies found in various
ragas will not be the same; a melody cannot be transposed from one
raga to another, because they are simply too different.
You may have noticed that major-key music tends to have different moods than minor-key music. (See
Major Keys and Scales for more about this.)
Ragas are also associated with particular moods. Some are also associated with a specific time of day (early evening, for example) or year (the monsoon season, for example). Creating the
raga's proper mood is one of the Indian musician's most important tasks.
Harmony and Tuning
Much of the interest in Western music lies in its complex, ever-changing
harmony. Indian music takes a different approach. Melodic scales and rhythms are much, much more various and complex than they are in Western music. Harmony, on the other hand, is usually kept simple, in the form of an unchanging
drone of a
pure perfect fifth or
perfect fourth. (See
below for more about the drone instrument.)
Rhythm: The Tala
Western music tends to use only a few popular
meters for almost all of its music, and these meters are usually felt as repetitions of two, three, or four beats. The rhythms of Indian music, rather than being organized into short
measures, are organized in long rhythmic cycles called
talas (in southern Indian
thaalam). There are more than 100 different
talas. These rhythmic cycles are quite long and complex; the Karnatic tradition in particular includes some of the most complex and sophisticated rhythmic structures of any music tradition.
But some sections of a performance (see
below) may be in free rhythm, with the
tala introduced in the middle of the piece.
Color and Texture
The
texture of Indian music is typically a single melody supported by
drones and rhythm percussion.
The
timbre (color) of Indian music can sound very exotic to the Western ear, because of the unfamiliar instruments used.
The harmony is usually provided by a drone instrument called the
tanpura. (There are many alternative English spellings for the name of this instrument, including
taanpura and
tambura.) This instrument has four very long strings. The strings are plucked one after the other, continuously throughout the music. It takes about 5 seconds for one four-string cycle to be plucked, and although the drone itself is constant, the complex interactions between the
harmonics of the strings vary during the cycle, creating a shimmering, buzzing effect that the Western listener will find quite exotic.
In India, vocal soloists are very popular, but Westerners tend to hear instrumental soloists. The melody instrument is often also a stringed instrument: the most well-known is probably the
sitar, a
plucked-lute-family chordophone that has moveable frets to accomodate changes in tuning from one
raga to the next. Other popular solo strings include the
surbahar, which is basically a bass sitar, the
sarod, a fretless plucked-lute-family instrument, and the
vina, a
zither-family chordophone with gourd resonators. On many of these instruments, only some of the strings are for playing the melody. Other strings are drone/rhythm strings and/or strings that are not plucked but only vibrate sympathetically with the other strings. Again, this can produce a buzzing
timbre that Westerners find exotic.
There are other, less common solo string instruments. Bamboo flutes (bansuri or venu) are also popular solo instruments, and some Western instruments, particularly violin, are also fairly popular.
The rhythmic accompaniment is usually provided by the
tabla, a set of two small drums that are played with the hand. The
tabla is tuned to the
raga by tapping wedges on the side of the instrument. Because the
tabla is played with the hand rather than a stick or beater, the rhythms of the accomplished player are subtle and expressive as well as complex.
Form
There are many forms in Indian classical music, including shorter composed songs and hymns. But the form of the fully-explored
raga has three main sections.
The opening section, the alap, is a long, slow, free-rhythm improvisation. In it, the performer reveals the raga gradually, note-by-note. Although this section may be hardest to appreciate for listeners accustomed to the relentless rhythms of Western rock and pop, to those who understand Indian music, it is the section in which the musicianship of the great performer is most obvious.
The jor-alap section introduces a rhythmic pulse, and the music becomes more animated.
The percussionist joins in on the jhala section, as the music becomes faster, more rhythmically complex, and more exciting.