When the Human Voice Became an Orchestra: The A Cappella Experiment in Tamil Cinema
Foreword
A film song ordinarily begins with an orchestra, an electronic arrangement, or some combination of instruments. The singer supplies the melody, while percussion establishes the pulse and other instruments furnish harmony, colour, texture, and counterpoint. But what happens when the orchestra is removed and the human voice is asked to do the work of the instruments?
That deceptively simple question opens an intriguing chapter in Tamil film music. The story is not merely about singing without instruments. It is about timbre, vocal layering, rhythmic imitation, choral texture, and the extraordinary capacity of the human voice to function as a musical instrument.
The history becomes particularly fascinating when the recollection of Kamal Haasan about an earlier creative ambition shared with Ilaiyaraaja is placed alongside the subsequent experiments of A. R. Rahman, the late Mahesh Mahadevan, and Ilaiyaraaja himself.
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Constitutional Requirement
Article 51A(h) of the Constitution of India calls upon citizens to develop scientific temper, humanism, and the spirit of inquiry and reform. Studying music through acoustics, recording technology, vocal production, orchestration, and the history of experimentation is one small but meaningful way of exercising that spirit of inquiry.
About the Author
I am Dhinakar Rajaram, an independent writer and communicator with a longstanding interest in music, cinema, science, astronomy, technology, history, and the cultural stories that connect them. I write about subjects that invite closer examination, particularly those in which an apparently familiar idea reveals a more interesting story beneath the surface.
My principal interest in this essay is Tamil film music and its experimentation with the human voice as a musical instrument. The subject brings together composition, orchestration, performance, recording, and the imaginative possibilities of the human voice. My approach is that of an interested independent researcher and writer, rather than that of a professional musicologist.
I have a particular interest in looking beyond the commonly repeated versions of a story and examining the chronology, creative context, and terminology behind it. In the present essay, that means distinguishing between a cappella, vocal instrumentation, vocal percussion, and vocal orchestration, while also separating documented musical history from the personal recollections of the artists concerned.
My wider interests include astronomy and science communication, and I have been involved in astronomy observation, public outreach, and independent study for many years. I am a founding member of the Tamil Nadu Astronomical Society and a HAM Radio Operator, VU3DIR.
This essay is ultimately about a deceptively simple but remarkable musical idea: what happens when the human voice is asked not merely to sing, but to become the orchestra?
— Dhinakar Rajaram
Preface: More Than Singing Without Instruments
The expression a cappella comes from Italian and is commonly understood to mean vocal music performed without conventional instrumental accompaniment. Yet that dictionary definition does not quite convey the ingenuity involved when a composer asks singers to imitate an orchestra.
A bass line can be suggested by a low male voice. A rhythmic pulse can be constructed from syllables, consonants, mouth sounds, or percussive vocal effects. Sustained voices can suggest strings. Short, sharply articulated syllables can imitate percussion. Several recorded voices can be layered to produce a harmonic pad or a quasi-instrumental texture.
The distinction matters because not every song containing prominent vocal layers is strictly a cappella. A song may contain a cappella passages, vocal percussion, or vocal orchestration, while still employing conventional instruments elsewhere.
Tamil cinema provides some particularly ingenious examples of this musical sleight of hand.
What Is A Cappella?
The phrase a cappella is familiar to many music lovers, but it is often used rather loosely. Before looking at its place in Tamil cinema, it is worth pausing to understand precisely what the term means.
In its simplest musical sense, a cappella means music performed by voices without instrumental accompaniment. The Oxford Advanced Learner's Dictionary defines it as music “for singing voices alone, without musical instruments”, while Merriam-Webster similarly defines it as music performed “without instrumental accompaniment”. The expression comes from Italian and literally means “in chapel style”.
The essential point, therefore, is not how many singers there are. A solo singer can sing a cappella. So can a small group, a large choir, or a carefully constructed collection of separately recorded vocal tracks. What matters is that the musical texture is created by the human voice rather than by conventional instrumental accompaniment.
More Than One Person Singing
A cappella music need not sound simple. In fact, some of its most fascinating possibilities emerge when several voices perform different musical functions simultaneously.
One voice may carry the principal melody. Another may provide a harmony line. A lower voice may supply the equivalent of a bass part. Several voices may establish rhythmic patterns. Others may produce short syllables, breaths, clicks, humming, vocalised sounds, or other carefully controlled effects that serve a musical purpose.
In such an arrangement, the listener may hear something resembling an entire instrumental ensemble, even though no conventional instrument is actually playing.
This is where a cappella becomes particularly interesting for film music. The composer and arranger are no longer thinking of the voice merely as the carrier of lyrics. The voice itself becomes a source of melody, harmony, rhythm, bass, texture and timbre.
The Human Voice Can Imitate an Orchestra
The human voice is an extraordinarily flexible musical instrument. It can sustain a note, move rapidly between pitches, produce different vowel colours, sing several independent lines, articulate rhythmic syllables, imitate percussive sounds, and alter its tone to suggest very different musical textures.
Modern recording technology expands these possibilities still further. A singer's voice can be recorded several times, with each recording assigned a different musical role. The separate tracks can then be combined into a single arrangement. What appears to the listener as a chorus may therefore be the carefully constructed result of many individual vocal performances.
Consider a simple imaginary arrangement. The lead singer sings the melody. A group of lower voices supplies the bass movement. Another group sings sustained harmonies. Short, sharply articulated vocal sounds establish the rhythm. Yet another layer imitates a string or wind texture.
There is still no violin, bass guitar, drum kit, or synthesiser in the arrangement. The musical architecture is being supplied by voices.
That is the central idea behind the expression “the human voice as an orchestra”.
A Cappella Is Not the Same as Every Vocal Effect
There is, however, an important distinction to be made. Not every song containing prominent vocal effects is automatically an a cappella song.
Vocal percussion refers specifically to rhythmic or percussive sounds produced by the voice or mouth. Vocal instrumentation describes the use of voices to imitate or substitute for instrumental sounds. Vocal layering means placing multiple recorded or performed vocal lines together. Vocal orchestration goes a step further: different vocal parts are deliberately assigned different musical functions, rather as sections of an orchestra are given different roles.
These techniques can occur within an a cappella performance, but they are not themselves definitions of a cappella.
For example, a song could contain a passage in which human voices imitate drums and bass while an actual keyboard continues underneath. That passage would demonstrate vocal percussion and vocal instrumentation, but the complete recording would not be purely a cappella because an instrumental accompaniment remains.
Conversely, an entirely vocal recording could contain remarkably sophisticated orchestration. It would still be a cappella, because the absence of conventional instrumental accompaniment remains the defining feature.
“Without Instruments” Does Not Mean “Without Arrangement”
This distinction is especially important because “unaccompanied” can sometimes be mistaken for “unarranged”. They are not the same thing.
A cappella music can be meticulously composed and arranged. It can have an introduction, counter-melodies, harmonic movement, bass lines, rhythmic patterns, call-and-response passages, climaxes, transitions, and a carefully planned ending. The absence of instruments does not mean the absence of musical architecture.
Indeed, removing the conventional orchestra can make the arranger's work more demanding. Every musical function that would ordinarily be distributed among instruments has to be reconsidered: who provides the bass? Who supplies the rhythmic pulse? How is harmony established? How is a transition marked? How does the arrangement create contrast without simply adding another instrument?
The answer, in an a cappella arrangement, is usually another voice — or another way of using the voice.
From Choir to Recording Studio
The concept has a long history in vocal music, particularly in choral traditions. The Italian expression a cappella is associated with “chapel style”, and the term became connected with vocal music performed without instrumental accompaniment. Modern usage, however, extends far beyond sacred choral music and includes secular, popular, jazz, folk, and contemporary recorded music.
There is also an interesting historical caution here. The older phrase “chapel style” should not be interpreted too mechanically as proof that every historical performance labelled in that manner was literally devoid of instruments. Historical performance practice could involve instruments doubling vocal parts. The modern meaning of a cappella is much clearer: the musical performance is carried by voices without instrumental accompaniment.
In the recording studio, the possibilities become even more extensive. The same singer may perform several parts separately, allowing the producer, composer, arranger, and recording engineer to construct a dense vocal texture from individually recorded tracks.
Thus, the modern studio can turn a single human voice into many musical voices — and many voices into something approaching an orchestra.
Why the Distinction Matters in Tamil Film Music
This vocabulary becomes particularly useful when examining Tamil film songs. A song may contain an entirely vocal passage, a vocalised imitation of instruments, rhythmic vocal effects, layered harmonies, or a mixture of these techniques. Calling all of them simply “a cappella” can conceal the very experimentation that makes the music interesting.
Therefore, in the discussion that follows, a cappella will be used in its proper sense: music made without conventional instrumental accompaniment. Where the musical construction involves voices imitating instruments or performing separate instrumental functions, terms such as vocal instrumentation, vocal percussion, vocal layering, and vocal orchestration will be used where they describe the technique more precisely.
This distinction also helps us approach the history without forcing every innovative song into a single category. The important question is not merely, “Was this the first a cappella song?” It is also, “What exactly were the composer, singers, arrangers, and recording team doing with the human voice?”
That question takes us from the dictionary definition of a cappella to the much more intriguing story of how the idea was explored in Tamil cinema.
1. The Idea Before the Recording
Long before the phrase a cappella became associated with particular Tamil film songs, the underlying musical idea had already occurred to artists working within Tamil cinema. This is an important distinction: sometimes the idea exists before the recording that eventually makes it widely known.
According to a retrospective recollection by Kamal Haasan, he and Ilaiyaraaja had discussed and shared an interest in creating a complete song using the human voice without the conventional instrumental arrangement. The intention was not merely to have a chorus accompany a singer. The larger idea was to make the voices themselves perform the musical functions that would ordinarily be entrusted to instruments.
The concept, however, was not successfully realised by the pair in the precise form they had envisaged at that stage. That detail is significant. It reminds us that an idea in music and its practical realisation are not necessarily simultaneous events.
Recording an elaborate vocal arrangement involves considerably more than composing a melody. The composer has to imagine the harmonic and rhythmic structure, the singers have to reproduce their individual parts accurately, and the recording process has to preserve enough separation and clarity for those parts to be assembled into a coherent whole. The limitations of recording practice, studio time, available technology, performance technique, and the demands of filmmaking can all affect whether an experimental idea reaches the screen.
A musical concept may therefore remain an unrealised intention for years. Another composer or recording team may later encounter a similar idea, discover a practical method of executing it, and present it to a much larger audience. Once the resulting recording becomes popular, the earlier history can easily disappear from public memory.
This is why the history of experimental film music should not always be reduced to a hunt for a single “first”. The person who conceived an idea, the person who successfully executed it, and the artist whose recording brought the technique to wide public recognition need not be the same person.
In other words, conception, execution, and popular recognition are three different milestones.
The distinction is particularly useful in the present discussion. The question is not simply who first thought of replacing an orchestra with voices. We must also ask when the idea was actually recorded, what musical functions the voices performed, how completely conventional instruments were excluded, and how the resulting work was presented to the listening public.
Seen in this light, the story becomes less like a race with one winner and more like a sequence of experiments in which composers, singers, actors, arrangers, and recording engineers explored the possibilities of the human voice.
That broader perspective takes us naturally to the early 1990s, when an unusually distinctive experiment in Tamil film music reached listeners in a particularly memorable form.
2. “Raasathi”: A Memorable Landmark
A. R. Rahman's “Raasathi”, from Mani Ratnam's Thiruda Thiruda (1993), occupies an important place in this story. The song, sung by the late Shahul Hameed, is widely recognised as an a cappella number and is frequently mentioned when discussing the emergence of strikingly unconventional vocal arrangements in Tamil film music.
The significance of “Raasathi” lies not simply in the absence of a conventional instrumental accompaniment. Its impact comes from what the recording does with that absence. Instead of leaving the singer exposed against silence, the arrangement makes the human voice itself part of the musical environment.
The voice becomes more than a vehicle for the words. It becomes melody, texture, rhythm, atmosphere, and musical colour. The listener's attention is consequently drawn to the physical and sonic possibilities of singing itself: the shaping of vowels, the attack and release of syllables, the use of sustained tones, and the interaction between separate vocal layers.
This is one of the fascinating characteristics of a cappella music. When an orchestra is removed, the ear begins to notice things that might otherwise remain beneath the instrumental arrangement. The grain of the voice becomes part of the instrumentation. Breath, articulation, resonance, harmony, repetition, and the precise placement of vocal sounds can all become compositional material.
“Raasathi” is therefore important not merely because it can be described as a song without conventional instrumental accompaniment, but because it demonstrates how the absence of instruments can itself become an artistic device.
The recording also illustrates why the word a cappella should not be confused with “simple singing”. A cappella music can be highly arranged. The absence of instruments does not remove the need for musical structure; rather, it transfers some of the structural responsibility to the voices themselves.
In this context, the descriptive expression “vocal architecture” is useful. It suggests a recording in which voices are not merely placed one behind another, but are organised into a deliberately constructed musical structure. Melody, supporting vocal material, rhythm, resonance, and texture can occupy different layers of the same sonic space.
It is nevertheless important to maintain historical proportion. “Raasathi” should not automatically be described as the moment when a cappella was invented in India, or even as proof that no comparable experiments had occurred earlier. Vocal music without instrumental accompaniment has a long history in many musical traditions. The safer and more meaningful observation is that “Raasathi” became a prominent and memorable Tamil film realisation of the technique, and that its sound helped demonstrate how unconventional vocal treatment could function within a mainstream film soundtrack.
Its place in the chronology is therefore best understood as a landmark rather than an absolute starting line.
And only a year later, another Tamil film would take the idea in a somewhat different direction: not merely using voices without instruments, but making the voices behave as though they were an instrumental ensemble.
3. Mahesh Mahadevan and Nammavar
The next stage is particularly interesting because it brings the earlier Kamal Haasan recollection into the discussion.
Mahesh Mahadevan composed the music for K. S. Sethumadhavan's Nammavar (1994), a film associated closely with Kamal Haasan, who wrote its story and screenplay and played the principal role. Among the soundtrack's more unusual creations is the extended number “Ethilum Valvlan Da”.
The song is especially relevant to this discussion because its musical construction draws attention to the human voice as a substitute for conventional instrumental functions. It does not simply place a group of singers behind a lead vocalist. Instead, different vocal sounds are organised to create the impression of accompaniment, rhythm, and instrumental colour.
The song itself makes the idea unusually explicit. Its words draw attention to the fact that the accompanying and rhythmic effects are being produced through the human voice. In effect, the musical device is not merely something for the listener to discover; the song invites the listener to notice the experiment.
This gives “Ethilum Valvlan Da” an almost demonstrative quality. It can be heard not only as a film song, but also as an exhibition of what singers can do when the normal division between “singer” and “accompaniment” is deliberately dismantled.
A conventional arrangement might divide the musical labour between a vocalist, percussionists, bass instruments, melodic instruments, and harmonic accompaniment. Here, those functions can instead be represented through different vocal layers. One set of voices may carry the principal musical line, another may reinforce harmony, another may establish rhythmic movement, while yet another may create sounds that suggest the attack or texture of an instrument.
This is where the distinction between a cappella and vocal instrumentation becomes particularly useful. A cappella describes the absence of conventional instrumental accompaniment. Vocal instrumentation describes what the voices are being made to do: they imitate, replace, or perform functions normally associated with instruments.
The two ideas can therefore overlap. A recording can be a cappella and, at the same time, employ extensive vocal instrumentation and vocal percussion. But the terms are not interchangeable.
“Ethilum Valvlan Da” is particularly valuable as an example because the voices are not treated merely as a homogeneous choir. They are arranged as a collection of contrasting sonic components. The result is closer to vocal orchestration than to the conventional image of a group of singers simply singing the same melody together.
The distinction may appear technical, but it changes the way we listen. Once we stop asking only, “Is there an orchestra in this song?”, a more interesting set of questions emerges: Which musical functions are being performed by voices? How are the layers separated? Which sounds suggest rhythm? Which provide harmonic support? Which imitate instrumental timbres?
Those questions reveal the craftsmanship behind the experiment.
It is for this reason that “Ethilum Valvlan Da” deserves more than a passing footnote in any discussion of the development of vocal experimentation in Tamil film music. It provides an unusually explicit example of the voice being treated as a source of musical accompaniment rather than merely as the carrier of the lyric.
There is also an intriguing historical connection here. Kamal Haasan's later recollection of the earlier ambition shared with Ilaiyaraaja makes the Nammavar experiment especially noteworthy. The history should not, however, be simplified into a claim that one person merely “passed” an idea to another. The available recollection establishes an earlier creative intention; the film provides a later, concrete realisation by Mahesh Mahadevan and the performers involved. The relationship is therefore best described as part of the evolving story of an idea rather than as a simple chain of ownership.
4. The College-Competition Setting Was No Accident
There is another reason why the treatment of “Ethilum Valvlan Da” is particularly effective within Nammavar: the film places the musical experiment within a college environment. The setting gives the unusual arrangement a dramatic context rather than presenting it as an isolated technical exercise.
A musical competition naturally creates a situation in which performers are expected to demonstrate imagination, skill, teamwork, and originality. The vocal experiment consequently becomes part of the dramatic language of the film. The audience within the story is watching a performance, while the audience outside the story is simultaneously being invited to appreciate the ingenuity of the musical construction.
This is an important difference. A cappella and vocal orchestration can easily appear, on paper, to be technical concepts belonging to a music classroom or recording studio. Cinema gives them another dimension. The technique can become part of character, competition, spectacle, humour, youthful energy, or dramatic presentation.
In Nammavar, the arrangement therefore works on two levels. At the first level, it is a piece of music designed to be heard. At the second, it is a demonstration within the fictional world of the film — a performance in which the participants effectively show what can be achieved with their voices.
The competitive setting also makes the central musical question almost playful:
What if the orchestra could be made out of people?
That is a much more ambitious proposition than simply asking a choir to sing together.
A conventional choir generally works with voices as voices: soprano, alto, tenor, bass, and their harmonic relationships. A vocal orchestra, by contrast, can assign voices additional jobs. One performer may function as a bass instrument, another may supply a rhythmic pattern, another may imitate a melodic instrument, while several others create sustained harmonic or textural layers.
The distinction is subtle but fundamental. A choir is primarily a vocal ensemble; a vocal orchestra is an arrangement in which the voices collectively perform a broader range of instrumental and musical functions.
This makes the Nammavar sequence an important bridge in the story. It demonstrates how an a cappella idea can develop into something more elaborate: the human voice is no longer merely replacing silence left by the removal of instruments; it is being deliberately organised to occupy the spaces that an instrumental arrangement would ordinarily fill.
And that brings us to the next stage of the story — the point at which vocal layering and instrumental imitation become still more elaborate in Tamil film music.
5. From Chorus to Vocal OrchestraA conventional chorus generally reinforces a melody, supplies harmony, answers the lead singer, or enlarges the emotional scale of a passage. A vocal orchestra, by contrast, assigns different musical functions to different voices.
Once this principle is understood, the ingenuity becomes easier to hear. The listener is no longer asking, “Where is the drum?” The listener begins to ask, “Which voice is behaving like the drum?”
6. Ilaiyaraaja's Later Vocal Orchestration
The story takes another interesting turn with Ilaiyaraaja's “Naan Porandhu Vandhadhu” from Maya Bazaar (1995). By this point, the idea of using the human voice to reproduce the functions of instruments had developed into a remarkably elaborate form.
The song is sometimes described simply as an a cappella composition. That description, however, does not tell the whole musical story. A closer examination of the arrangement reveals something more specific and, in many ways, more fascinating: the backing voices are used to imitate instrumental functions.
An account of Ilaiyaraaja's later concert presentation of the song describes vocal parts corresponding to the functions of strings, shakers, tabla, drums, and even bass guitar. The concert presentation was particularly revealing because the vocal treatment could be followed by an instrumental version, allowing the listener to hear how closely the vocal arrangement had reproduced the functions of the conventional instruments.
This distinction matters. The song is not simply a group of singers standing in for a conventional chorus. The voices are being organised as components of an instrumental vocabulary.
In a conventional arrangement, a string section might establish a particular texture, percussion might provide the rhythmic foundation, a bass instrument might anchor the lower register, and other instruments might contribute accents or movement. In this treatment, comparable musical functions are assigned to voices.
The result is therefore better understood as an example of vocal orchestration — an arrangement in which different vocal parts are deliberately given different musical functions, including functions normally performed by instruments.
This is a useful point at which to return to the distinction established earlier in this essay. A cappella tells us what is absent: conventional instrumental accompaniment. Vocal orchestration tells us what the voices are doing: they are being organised to reproduce or replace musical functions normally assigned to instrumental sections.
The two concepts can overlap, but they should not be treated as synonyms.
There is another fascinating element in Ilaiyaraaja's treatment. The backing voices do not necessarily need to pronounce meaningful words. Their purpose may instead be primarily musical. A syllable, vocal sound, hum, or phonetic fragment can be selected because it possesses the right attack, duration, pitch, resonance, or rhythmic character.
In that situation, the voice briefly changes its identity. It is no longer being used principally as a linguistic instrument carrying semantic information. It becomes an acoustic material from which the composer can construct rhythm, texture, timbre, and movement.
This is one of the more sophisticated possibilities of vocal orchestration. The listener may hear what appears to be a string figure, a percussive pattern, or a bass movement, yet the actual source is a human performer producing carefully selected vocal sounds.
What makes the experiment particularly striking is that the listener can appreciate it at two levels. At one level, the song functions simply as a piece of film music. At another, the attentive listener can begin to identify the extraordinary amount of musical labour hidden inside the vocal arrangement.
The apparently casual syllable may be doing the work of a drum hit. A low vocal line may provide the function of a bass instrument. A group of sustained voices may create the impression of strings. The arrangement consequently turns the singer into something more than a singer: the performer becomes one component of a much larger voice-built ensemble.
It is this transformation — from voice as melody to voice as musical machinery — that makes “Naan Porandhu Vandhadhu” particularly valuable to the history being examined here.
7. Why the Syllables Matter
One of the least obvious aspects of vocal instrumentation is the importance of the actual sounds used by the singers.
When an instrumentalist plays a violin, mridangam, bass guitar, flute, or percussion instrument, the sound is determined by the physical characteristics of that instrument and by the performer's technique. The musician does not have to choose a spoken syllable to produce the desired attack. A vocal arranger faces a rather different problem.
Human voices naturally suggest speech. The moment a singer produces a syllable, the listener may instinctively attempt to interpret it as language. But in vocal instrumentation, the semantic meaning of a syllable may be completely secondary to its acoustic behaviour.
A short consonant can provide a sharp attack. A more open vowel can produce a sustained, resonant tone. A repeated syllable can establish a rhythmic figure. A sequence of tightly articulated sounds can suggest percussion, while a sustained vowel can create a smoother musical line.
The choice is therefore not necessarily governed by the meaning of the word. It may be governed by the sound the mouth can produce.
This leads to a useful descriptive idea: phonetic orchestration. This is not being proposed here as a formal category of musicological terminology, but as a convenient way of describing a compositional process in which speech sounds are selected partly for their acoustic and musical properties.
Consider the difference between a syllable with a crisp consonantal beginning and one consisting largely of a sustained vowel. They behave differently when repeated rapidly. They have different attacks, different resonances, and different capacities to blend with neighbouring voices.
A composer arranging several vocal layers therefore has something resembling a palette of sounds. The choice of syllable can affect the perceived sharpness, softness, weight, continuity, or rhythmic definition of a passage.
This explains why apparently meaningless vocal syllables need not be meaningless musically. What sounds like verbal gibberish to the listener may actually be carefully selected sonic material.
In a particularly elaborate arrangement, the listener is therefore hearing two systems simultaneously. There is language, in which words communicate meaning, and there is sound, in which the physical properties of those words and syllables contribute to the musical arrangement.
The distinction becomes especially important in backing-vocal passages. The lead singer may be delivering the lyrical content, while the accompanying voices are effectively performing an instrumental role. Their syllables need not advance the narrative. Their job may be to provide rhythm, harmony, colour, or texture.
The human voice thus acquires two identities within the same recording: voice as language and voice as instrument.
8. The Recording Studio as an Instrument
There is also a technological dimension to this development. The possibilities of elaborate vocal orchestration are greatly increased when individual vocal parts can be recorded separately and subsequently combined.
A singer does not have to reproduce every part simultaneously. One vocal line can be recorded first, followed by another, then another, and another. The separate performances can subsequently be balanced, layered, edited, and mixed into a single musical structure.
This is the essence of multitrack vocal construction.
A group of singers can therefore become an ensemble in the recording studio even when the individual performers have recorded their parts separately. Each layer can be given its own position and function within the arrangement, much as different sections of an orchestra occupy different musical territories.
The recording studio consequently becomes more than a place where a finished performance is simply captured. It becomes part of the creative process.
This does not mean that technology itself creates the musical idea. The composer and arranger still have to imagine the structure. The singers still have to perform it. The recording engineer still has to capture and balance it. Technology provides the means by which the separate components can be assembled with sufficient precision.
A voice-based arrangement can therefore be thought of as an orchestra constructed in layers. The analogy should not be taken too literally — a human voice does not physically become a violin or a drum — but the musical function of the voice can be made analogous to that of an instrument.
There is something rather delightful about the principle. If an instrument is unavailable, the composer can ask a singer to imitate its musical function. If one voice is insufficient, record another. If two are insufficient, add a third. If a rhythm needs reinforcement, create another vocal layer.
The underlying idea is remarkably direct: if an instrument cannot be used, perhaps the voice can perform its musical job.
Modern recording practice has made such construction increasingly practical, but the creative impulse itself is much older than digital audio. What technology changes is the degree of control with which the idea can be realised.
9. Was Anyone Really “First”?
This is where historical caution becomes essential.
It is tempting to identify a single composer or song as the “first” a cappella experiment in Tamil cinema. Such statements make for convenient headlines, but they can turn a complicated musical history into an unnecessarily simple one.
Vocal music without instrumental accompaniment is much older than cinema itself. Choral traditions, devotional singing, folk practices, stage performance, school and college ensembles, and other forms of communal or individual vocal music have existed for generations. Not every experiment would have been documented, recorded, commercially released, or subsequently preserved in easily accessible archives.
There is a further complication. “A cappella” is only one part of the story. A recording may contain an a cappella section without being entirely a cappella. A conventional song may contain backing voices that imitate instruments. Another may use vocal percussion while retaining an instrumental accompaniment. Yet another may construct a complete vocal arrangement in the studio.
Consequently, asking simply “Who was first?” can conceal several different questions:
- Who first conceived the idea?
- Who first attempted to record it?
- Who first achieved a substantially complete vocal arrangement?
- Who first used voices to imitate specific instrumental functions?
- Which recording brought the technique to wider public attention?
These are not necessarily questions with the same answer.
Within the particular chronology examined in this essay, the identifiable milestones are more useful than an absolute declaration of priority:
- Kamal Haasan and Ilaiyaraaja: Kamal Haasan's retrospective account describes an earlier shared desire to create a complete a cappella song. This establishes an earlier creative intention, rather than by itself establishing a commercially released recording.
- A. R. Rahman's “Raasathi” — 1993: a prominent and widely recognised example of a cappella treatment in Tamil film music, sung by the late Shahul Hameed.
- Mahesh Mahadevan's “Ethilum Valvlan Da” — 1994: an unusually explicit experiment in using human voices to perform accompanying and rhythmic functions normally associated with instruments.
- Ilaiyaraaja's “Naan Porandhu Vandhadhu” — 1995: a particularly elaborate example of vocal orchestration, in which backing voices reproduce several instrumental functions. The detailed concert account is especially useful in revealing the relationship between the vocal and instrumental versions.
This sequence should not be interpreted as a chain of simple imitation or artistic ownership. Musical ideas can emerge independently, circulate through conversations and listening, remain unrealised for a period, and later appear in another form.
Nor should a retrospective recollection be treated in exactly the same way as an independently documented recording. A recollection can be valuable historical evidence, particularly when it comes from a participant, but it represents that person's memory of the creative process. A released recording, meanwhile, provides a directly examinable musical artefact.
The responsible approach is therefore to preserve both: the recollection tells us about the idea; the recording tells us about its realisation.
10. A Small but Significant Chapter in Tamil Musical Innovation
Tamil film music has often been discussed through its great melodies, singers, lyricists, composers, orchestras, recording innovations, and memorable film situations. Yet some of its most inventive moments can be found in the details of arrangement — decisions that may pass unnoticed during an ordinary listening session.
The experiments discussed in this essay belong to that category.
They demonstrate that musical innovation does not always announce itself with a dramatic new instrument or an obviously unfamiliar melody. Sometimes it appears in the arrangement: a strange rhythmic syllable beneath a singer, a chorus that suddenly begins to resemble percussion, a low vocal layer that behaves like a bass instrument, or a collection of voices that briefly creates the impression of an entire instrumental ensemble.
What makes these experiments particularly interesting is that the basic material remains remarkably familiar. Everyone possesses a voice. Yet the musical imagination can reorganise that familiar instrument into something unexpectedly complex.
Kamal Haasan's recollection adds an earlier layer to this history, describing an intention shared with Ilaiyaraaja to make a complete a cappella song. Rahman's “Raasathi” subsequently provided a prominent film-music example. Mahesh Mahadevan's “Ethilum Valvlan Da” pushed the idea towards explicit vocal instrumentation, while Ilaiyaraaja's “Naan Porandhu Vandhadhu” demonstrated an elaborate form of vocal orchestration.
These works should not be treated as interchangeable. Each uses the human voice differently, and each belongs to a different stage in the evolution of the idea.
The common thread is the willingness to reconsider what a singer is allowed to do.
A singer need not merely carry the melody. A voice can reinforce harmony, establish rhythm, supply bass movement, imitate an instrumental texture, create an accent, or provide an entire layer of sonic colour.
The real achievement, therefore, was not simply the removal of instruments.
It was the discovery of how much of an orchestra could be suggested by the human voice itself.
11. A Note on “Kanmani Anbodu Kadhalan”
Kamal Haasan's association with experimental musical form also naturally brings to mind “Kanmani Anbodu Kadhalan” from Gunaa (1991), with music by Ilaiyaraaja.
The song is remarkable for a different reason. It deliberately combines spoken dialogue with sung passages, creating the impression of a personal letter being composed, read, discussed, and sung within the same musical sequence. The song is widely noted for this unusual dialogue-and-song construction.
Its unusual structure makes it relevant to this essay because it demonstrates how readily Tamil film music can blur the boundaries between speech, song, drama, and musical performance. The voice is being used not merely to sing lyrics but also to convey character, conversation, hesitation, humour, intimacy, and dramatic action.
It is important, however, not to classify “Kanmani Anbodu Kadhalan” as an a cappella song simply because it is an unusual vocal composition. Its defining innovation lies elsewhere — in the integration of dialogue and song within the musical form.
This distinction is not pedantry. If every unconventional vocal treatment is labelled “a cappella”, the term loses its explanatory value. Precise terminology allows us to appreciate different experiments for what they actually achieved.
In the present context, “Kanmani Anbodu Kadhalan” is therefore best treated as a related example of vocal and dramatic experimentation, but not as one of the principal a cappella examples under discussion.
Addendum: A Cappella Is Not “Acapella”
One small matter of spelling deserves attention because the incorrect form appears very frequently in informal writing.
The conventional musical spelling is a cappella, written as two words. It is an Italian expression traditionally associated with singing in the manner of a chapel or church ensemble.
The form “acapella” is widespread in casual usage, and readers will readily recognise what it means. Nevertheless, it is not the standard form used in formal musical writing.
There is also a useful linguistic reason to retain the original form. A cappella is not an English word invented to describe a modern pop-music technique. It is an established Italian musical expression that entered wider international musical vocabulary.
In a formal essay, therefore, a cappella is the preferred spelling.
The small space between the two words may look insignificant, but in a discussion devoted to musical precision, even such details are worth getting right.
Listen to the Musical Experiments
The ideas discussed in this article are best understood by listening to the recordings themselves. The following three examples represent different stages and approaches in the development of vocal experimentation in Tamil film music. They should not all be described simply as “pure a cappella”; each demonstrates a somewhat different relationship between the human voice, rhythm, harmony, and instrumental imitation.
1. “Rasathi” — Thiruda Thiruda (1993)
Song: “Rasathi” / “Rasathi En Usuru”
Film: Thiruda Thiruda (1993)
Singer: Shahul Hameed
Music: A. R. Rahman
Lyrics: Vairamuthu
Director: Mani Ratnam
“Rasathi” is an important listening point in the history discussed here. Its vocal treatment demonstrates how the human voice can be used as more than a conventional carrier of melody and lyrics. The arrangement gives the listener an unusually exposed vocal texture and shows how rhythm, harmony, and vocal colour can become part of the musical architecture itself.
It is therefore useful to hear the song alongside the later examples rather than treating it simply as a question of who was “first”. The historical importance lies in the musical possibilities that the recording made audible to a large film audience.
2. “Ethilum Vallavan Da” — Nammavar (1994)
Song: “Ethilum Vallavan Da”
Film: Nammavar (1994)
Singers: Kamal Haasan, S. P. Balasubrahmanyam and Swarnalatha
Lyrics: Pulamaipithan and Vairamuthu
Music: Mahesh Mahadevan
This is a particularly revealing example because the human voice is treated almost as a collection of musical instruments. Rhythmic and accompanying sounds are incorporated into the vocal arrangement, demonstrating the possibility of using the mouth and voice not merely to sing words but also to construct musical texture.
The song is especially significant within the context of Nammavar, where the musical experiment is presented in a college setting. The setting gives the sequence an almost demonstrative quality: the audience within the film is watching a musical experiment, while the audience outside the film is simultaneously hearing what that experiment can achieve.
3. “Naan Porandhu Vandhadhu” — Maya Bazaar (1995)
Song: “Naan Porandhu Vandhadhu”
Film: Maya Bazaar (1995)
Music: Ilaiyaraaja
Singers: Arumozhi and Lekha
This example requires a small but important terminological qualification. Rather than describing the entire recording simply as a completely a cappella song, it is more accurately understood as an example of elaborate vocal orchestration. Human voices are used to imitate or suggest several instrumental functions, creating the impression of a much larger accompaniment through vocal means.
The arrangement is particularly interesting because the listener can hear how different vocal sounds can be assigned different musical duties. What might ordinarily have been supplied by sections of an orchestra can instead be suggested through carefully arranged voices, demonstrating how the boundary between “singing” and “instrumental accompaniment” can become remarkably fluid.
Three Recordings, Three Approaches
Listening to these three recordings consecutively makes the progression easier to appreciate. “Rasathi” demonstrates the striking possibilities of an exposed vocal texture; “Ethilum Vallavan Da” goes further into the use of voices for rhythmic and instrumental-like functions; and “Naan Porandhu Vandhadhu” demonstrates an elaborate form of vocal orchestration in which human voices can suggest several sections of an accompaniment.
They should not be forced into a simplistic competition over precedence. The more interesting story is the gradual expansion of the musical vocabulary: the singer need not merely sing the melody; the human voice itself can become part of the arrangement, the rhythm section, the harmonic bed, and even an imagined orchestra.
For that reason, these recordings are best approached not merely as songs to be heard, but as practical demonstrations of what happens when a composer and arranger begin asking a deceptively simple question: how much of an orchestra can the human voice itself suggest?
Expanded Glossary
The terminology surrounding vocal music can sometimes become blurred, particularly when the human voice is used not merely to sing a melody but also to reproduce functions ordinarily assigned to an orchestra. The following glossary therefore distinguishes between conventional vocal performance, a cappella singing, vocal orchestration, vocal percussion, and related recording techniques.
- A cappella
- Vocal music performed without conventional instrumental accompaniment. The expression comes from the Italian a cappella, traditionally meaning “in the chapel style”. In a sophisticated arrangement, however, the absence of instruments does not necessarily mean musical simplicity. Different voices may supply melody, harmony, bass, rhythmic figures, sustained harmonic beds, percussion-like sounds, and even imitations of instrumental timbres. A recording may also contain only certain a cappella passages rather than being completely a cappella from beginning to end.
- Vocal orchestration
- The deliberate distribution of different musical functions among different vocal parts. One group of voices may carry the principal melody, another may provide harmony, while others reproduce bass, rhythmic, sustained, or instrumental-like functions. Vocal orchestration therefore treats the human voice as an arranging medium capable of supplying several layers of an otherwise instrumental texture.
- Vocal instrumentation
- The use of the human voice to imitate, reproduce, or substitute for sounds normally associated with musical instruments. A voice may imitate a drum stroke, shaker, bass instrument, string section, or other accompaniment. Vocal instrumentation is particularly interesting because the listener may recognise the musical function without the sound being produced by the corresponding physical instrument.
- Vocal percussion
- Rhythmic sounds produced by the human voice, mouth, lips, tongue, breath, or other vocal techniques instead of conventional percussion instruments. The sounds need not resemble a particular drum literally; what matters is their rhythmic and percussive function within the arrangement.
- Vocal layering
- The stacking of separately performed or recorded vocal lines to produce greater harmonic, rhythmic, or timbral complexity. A single singer may contribute several layers, or several singers may be assigned different layers. In a recording studio, numerous vocal takes can be combined to create a texture considerably larger than the number of performers physically present at any one moment.
- Multitrack recording
- A recording method in which different musical parts are captured on separate tracks and subsequently combined. Multitracking permits melody, harmony, bass-like parts, percussion-like sounds, sustained voices, and other elements to be recorded independently before being balanced into the final mix. It has therefore become an important technical means by which elaborate vocal arrangements can be constructed.
- Track
- An individual recorded channel or layer within a multitrack production. A track may contain a complete performance, a vocal harmony, a rhythmic part, an instrumental passage, or a particular sound effect. In vocal production, several tracks may eventually be combined to create the impression of a much larger ensemble.
- Overdubbing
- The process of recording an additional performance over an existing recorded part. A singer can therefore record one vocal line, listen to it, and subsequently record another line designed to harmonise with or answer the first. Repeated overdubbing can create dense vocal textures from a relatively small number of performers.
- Timbre
- The characteristic tonal colour or quality of a sound that enables two sounds having the same pitch and approximately the same loudness to be distinguished from one another. Timbre depends upon the harmonic content, transient characteristics, resonance, and other properties of a sound. It is central to vocal instrumentation because a successful imitation depends not merely upon pitch but upon the character of the sound.
- Ostinato
- A short musical pattern that is repeated persistently beneath or alongside other musical material. An ostinato may be melodic, harmonic, rhythmic, or a combination of these. In vocal arrangements, repeated syllables or vocal figures can function as an ostinato, providing a stable rhythmic or harmonic foundation for the principal voice.
- Counterpoint
- The art and technique of combining independent melodic lines so that they sound simultaneously while retaining their individual identity and maintaining harmonic and rhythmic coherence. Counterpoint differs from simple chordal backing because the individual lines have a greater degree of melodic independence.
- Harmony
- The simultaneous sounding of different pitches and the relationships formed between them. Vocal harmony occurs when different singers, or different recorded vocal layers, sing complementary notes around or beneath a principal melody. Harmony can provide fullness, tension, colour, and structural definition.
- Attack
- The initial portion of a sound and, more specifically, the manner and speed with which that sound begins. Consonants such as t, k, p, and ch can create comparatively sharp vocal attacks. Such characteristics can be exploited when the human voice is being used to suggest percussion or other instruments with clearly defined transients.
- Acoustic texture
- The perceived density, colour, layering, and interaction of sounds within a musical arrangement. A texture may be sparse, dense, transparent, thick, rhythmically active, or sustained. In vocal orchestration, texture becomes especially important because the apparent size of the ensemble may be created entirely through the arrangement and layering of voices.
- Phonetic orchestration
- A useful descriptive expression for arranging syllables, consonants, vowels, breaths, and other vocal sounds according to their acoustic properties so that they perform musical functions. It is not presented here as a universally standard technical category of music theory. Rather, it describes a compositional approach in which the sound of a syllable can matter as much as, or sometimes more than, its semantic meaning.
- Vocal ensemble
- A group of singers performing together with coordinated melodic, harmonic, rhythmic, or textural roles. An ensemble may be a small group or a considerably larger body of voices. In vocal orchestration, different sections of the ensemble may effectively perform different “departments” of the musical arrangement.
- Choir
- An organised group of singers performing together, commonly divided into vocal ranges or sections. A choir and a vocal orchestra are not necessarily the same thing. A choir may principally perform a unified musical passage or harmonic arrangement, whereas a vocal-orchestral treatment may deliberately assign individual groups of voices different instrumental or rhythmic functions.
- Vocal bass
- A low vocal part used to provide the foundation of a musical arrangement. In a vocal-orchestral setting, low voices can imitate or substitute for some of the functions normally performed by a bass instrument. The result need not reproduce an actual bass instrument's timbre exactly; its musical role may be the more important consideration.
- Vocal drone
- A sustained or repeatedly maintained vocal pitch that provides a continuous tonal foundation beneath other musical material. Drone-like vocal layers can be especially effective in creating a sense of depth without requiring a conventional sustained instrument.
- Vocal texture
- The combined impression created by the number, arrangement, register, timbre, density, and interaction of vocal parts. A vocal texture can range from a single exposed voice to a highly layered construction containing numerous simultaneous parts.
- Register
- A particular range or region of pitch within which a voice or instrument operates. Different vocal registers possess different acoustic qualities. Arrangers can exploit high, middle, and low voices to create the equivalent of different sections of an instrumental ensemble.
- Semantics
- The meaning conveyed by words and language. In ordinary singing, lyrics primarily carry semantic meaning. In experimental vocal arrangements, however, individual syllables may also be selected for their rhythmic, percussive, resonant, or timbral properties. Thus, a vocal sound can operate simultaneously as language and as musical material.
References & Further Reading
- Thiruda Thiruda (1993) — soundtrack and song documentation concerning A. R. Rahman's music and “Raasathi”, widely discussed as an important early Tamil film example of an a cappella treatment. The song is particularly useful for examining how the human voice can be treated as part of the sound design rather than merely as the carrier of the lyric.
- Nammavar (1994) — film, soundtrack, and production documentation concerning Mahesh Mahadevan's music and the track “Ethilum Valvlan Da”, including its vocal performers and its unusual use of human voices for rhythmic and instrumental-like functions.
- “Ethilum Valvlan Da” — song and lyric documentation — useful for studying the unusual musical concept expressed within the song itself, including its reference to accompanying rhythmic sounds being created through the human voice. The song is therefore significant not merely as an example of vocal layering but as an unusually explicit presentation of the idea.
- Ilaiyaraaja — “Naan Porandhu Vandhadhu” from Maya Bazaar (1995) — musical discussion and listening material concerning the song's use of backing voices to imitate or suggest strings, shakers, tabla, drums, and bass-guitar-like functions. This example is more accurately described as elaborate vocal orchestration rather than simply being labelled a completely a cappella song.
- Ilaiyaraaja live-concert documentation — later concert presentations are useful for observing how vocal parts can be arranged as an ensemble and subsequently contrasted with instrumental realisations of the same musical material.
- Gunaa (1991) and “Kanmani Anbodu Kadhalan” — useful comparative material for understanding the broader experimentation of Kamal Haasan and Ilaiyaraaja with song form. The song is notable for integrating spoken conversation with sung passages and should not, however, be classified simply as an a cappella composition.
- Ilaiyaraaja 75 retrospective material — contemporary and retrospective coverage surrounding the 2019 Ilaiyaraaja 75 celebrations, including Kamal Haasan's participation and his recollections concerning his earlier musical discussions and ambitions with Ilaiyaraaja.
- General music-theory and recording references — standard literature on harmony, counterpoint, timbre, orchestration, vocal ensemble practice, multitrack recording, overdubbing, and sound recording provides the technical framework required to understand why human voices can reproduce functions normally assigned to instruments.
Source note: The chronology of the released songs is based on soundtrack, film, music, and archival documentation. The earlier Kamal Haasan–Ilaiyaraaja ambition to create a complete a cappella song is presented specifically as Kamal Haasan's retrospective recollection. It is therefore distinguished from a documented released recording and is not treated as independent proof that such a recording was completed.
The terms a cappella, vocal orchestration, and vocal instrumentation have also been deliberately kept distinct in this article. This distinction is important because a composition can contain extensive vocal imitation of instruments without being entirely a cappella.
Copyright & Sharing
© Dhinakar Rajaram 2026
This article is an original, independently written educational essay by Dhinakar Rajaram. It may be shared for educational and non-commercial purposes provided that the author's name, the article's context, and the original source are retained. Short quotations or brief extracts used for criticism, review, scholarship, teaching, research, or discussion should remain properly attributed and should not be presented as the work of the person reproducing them.
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The musical works, film titles, lyrics, melodies, recordings, names of composers, singers, performers, production houses, record labels, photographs, video material, and other third-party intellectual property mentioned or referred to in this essay remain the property of their respective rights holders. Their identification within this article is for purposes of musical discussion, historical examination, criticism, review, education, and scholarship.
Where a song, film, performance, interview, archival statement, or other source is discussed, the purpose is to examine its musical, historical, or cultural significance. Such discussion does not imply ownership of the underlying work or any transfer of rights in that material.
The essay has been independently phrased and does not reproduce another writer's prose. Where historical recollections, interpretations, or secondary musical analyses are used, they are distinguished from independently established facts wherever appropriate. Particular care has been taken to distinguish documented released recordings from retrospective recollections concerning earlier musical ideas or unrealised projects.
Source and information note: The discussion draws upon publicly available information and sources that are freely accessible to the public. Musical terminology and historical claims have been presented with the aim of maintaining the distinction between documented information, interpretation, and personal recollection.
For corrections, scholarly clarification, or factual additions concerning the musical history discussed here, readers are encouraged to consult the cited primary or archival material wherever available.
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