Eight hundred years ago, not a great deal of time by any measure but a human lifespan, the idea of harmony was unknown to musicians. By and large, the monks of the Middle Ages sang in unison, although with the passage of centuries someone got the idea of adding a second part that would move in parallel fourths. Fourths! A melody played in parallel fourths sounds open, characterless and inconclusive to our ears. What were they thinking?
And indeed, as time passed, the early experiments with multiple pitches became gradually bolder. Composers came to realize that the openness of fourths, fifths and octaves — their very ‘perfection’ — was actually something of a liability. Without the thicker, warmer sounds of the third and the sixth, music was too cool, too ethereal for varied emotional expression. Of course, liberty does not mean license. Some intervals — the diabolical diminished fifth, above all — had no place in music. While the long-term trend towards a more inclusive harmonic language was clear, important constraints remained in force. The strength of the I-V and V-I (‘authentic’) cadences, for example, provided a sort of universal substructure that was worked over by every important composer for hundreds of years, finally giving rise to the innumerable variations on sonata form in the Classical and Romantic eras.
But the unquestioned musical verities of one era turn inexorably into the chafing limitations of another. One by one the sacred cows were shooed away, and at last freedom reigned. Venturing ever farther afield, committed to ever-increasing chromaticity, composers introduced chords so colorful that their predecessors would hardly have admitted them as musical sounds at all. They turned to novel rhythms, novel forms, novel tonalities, novel instruments: an ever-accelerating cavalcade of novelty in an era of relentless exploration. Composers from Schoenberg onward have sought means of expression outside the envelope of musical convention, deploying techniques like tone-rows, microtones, polyrhythms, polytonalities, and all the rest. Exotic instrumental sounds have been conscientiously sought out and exploited at an ever-increasing pace. Where it once required a couple of hundred years to explore the possibilities even of the perfect fourth, in the modern era new techniques and devices can be born, displayed and discarded almost overnight. It has been a time of ferment and ceaseless innovation.
And it has left audiences cold, by and large. The accessibility of the 19th-century composers gave way to an intellectualized movement that may have stimulated the refined senses of the cognoscenti, and the elitist impulses of their poseur cronies, but failed to satisfy the human ear’s primitive love of simple rhythms, consonance, and predictable structure. And so the pendulum has swung back, away from the twelve-tone iconoclasts and conceptual ‘compositions’ like John Cage’s 4’33”, and toward the simpler, march-like, largely diatonic movie music of composers like John Williams. Most orchestral music heard today is in that mode, while ‘serious’ music is largely confined to the academy.
Composers like investigating new tools and possibilities. You can hardly blame them for that. Audiences listen to what they like, and would be fools to do otherwise. If the two have have grown apart, the fault is perhaps with music — music itself. The chromatically-oriented experiments of the past century brought exciting new possibilities to classical music. But from the point of view of the diatonic scale, chromaticity represents randomness, entropy, disorder. Beyond a certain point, attempts to heighten harmonic color shade into aural chaos. The same holds true for other musical devices. Virtually anyone can synchronize their responses to a plain two, three or four beat rhythm, but few can tap their feet — or indeed feel anything at all — when confronted with a tapestry of shifting polyrhythms, no matter how piquant such a thing may sound in theory.
But if harmony, rhythm and instrumentation have already been elaborated to the point of maximum variety and interest, beyond which additional complication sounds merely chaotic, what frontiers remain to be explored in music? Have all the possibilities been mined? Is there an end of musical history, and are we living it?
