Three prominent characteristics are associated with the name of Beethoven[26] (1770-1827), the greatest universal master in the chronicles of musical history. To him must be attributed the ideal culmination of classic purity, both as to structural design and thematic development. Through him, form became subordinated to human expression. From him the Romantic Movement drew its direct inspiration. In other words, Beethoven forged the connecting link between the classicists and the romanticists, between absolute and programmatic, objective and subjective music, between the primarily formal and the essentially soulful. In the general principles of form and technical procedure, Beethoven accepted the precedents established by his immediate predecessors, and his earlier works show the influence of both Haydn and Mozart. But the impelling force of his independent and assertive genius, nurtured by the rugged characteristics peculiar to the tendencies of his Dutch and German descent, urged him to further bold and unhesitating innovations whenever novel effects could thereby be attained.

In connection with distinctively formal treatment, the most prominent feature of this amplification lies in the development even to minuteness of inner details, the unification of thematic material, the increase of proportion, and the acquisition of breadth of style and nobility of subject-matter.

But of far more momentous purport are the fruits of his spirituality and profound religiousness. Beethoven was a tone-poet to the core, and his search for emotional expression caused him to disregard fixed design whenever it interfered with freedom of thought. Thus in adapting the cyclic sonata form, he enhanced it by means of perfected monody based on the higher Folk-song, by means of richer harmonies, freer modulations, varied rhythm, greater license in the juxtaposition of tonalities, and elasticity in the application of traditional forms—Beethoven's quest for beauty of form being, moreover, only secondary in importance to its own reactionary fitness for beauty of expression. Thus Beethoven became the master of form and expression combined, reconciled, unified.

Mozart and Beethoven share the same unique and unparalleled characteristics in that the genius of both of them was so universal in nature as to make the question of deciding in what particular branch of composition they excelled a difficult one. So Beethoven, greatest of symphonic exponents, enriched the world with string quartets and chamber music that are perfection exemplified, produced a mighty series of pianoforte concertos and sonatas that are unexcelled, and dedicated a host of his loftiest inspirations to the glorification of the Church. He wrote but one opera—it has become immortal; but one oratorio—the sincerity and depth of its pathos awaken sympathetic response at each renewed hearing; but one violin concerto—it is still the ideal, likewise the despair of every violin virtuoso. And upon riveting the attention solely upon the instrumentation of his orchestral pages, one finds that every bar of the score bears the impress of a master's touch, and of such a master as the world had never before produced. He discovered the utmost capabilities of each instrument, introduced innovations in the method of handling them, both as solo interpreters and in combination, and illustrated that even without the aid of a so-called modern orchestra, picture-painting can be attained. That is to say, impressions of the mind of insufficient distinctness to call forth verbal utterance, are nevertheless capable of tonal exposition. Hence arises the expression "musical language," and quite especially in connection with instrumentation one says that the orchestra "possesses the faculty of language." The Pastoral Symphony is a graphic exemplification of this truth.

Beethoven's instrumentation bears the unmistakable impress of his own personal individuality, and purely sensuous tone-effect is ever subordinated to the inceptive æsthetic scheme and clearness of thematic delineation. The employment of specific tonal quality of the various instruments capable of variated coloring, effectiveness, and scope, was absolutely faithful to the momentary requirements of the orchestral situation. And thus, while his predecessors had been absorbed in the contemplation and exposition of abstract musical thought, and, on the other hand, the sequent composers of the nineteenth century laid undue stress upon the portrayal of their conceptions in gorgeous orchestral raiment, Beethoven's masterpieces embody the temperate assimilation of fervent feeling, architectural structure, contrast of the various choirs, and intermixing of instrumental coloring, simultaneously and harmoniously developed, without apparent effort, all-satisfying, inseparable.

One feature of Beethoven's greatness is emphasized by the self-restraint he exercised in usually making demands for but a modest apparatus as the interpreter of his orchestral conceptions. Thus, in spite of being tremendously progressive, and betraying at every step the inclination to enlarge the scope of his creations in every way, he was content to employ Mozart's scoring for all of his symphonies excepting the Fifth, Sixth, and Ninth,—that is to say, strings, the four usual wood-instruments in pairs, two horns, two trumpets, and kettle-drums, were practically sufficient for his needs. This numerical distribution of parts differed but slightly in all but the above three excepted symphonies. Comparing this aggregation with those in Mozart's three representative symphonies, we find, as the only difference, that Beethoven's wood-wind includes two flutes in all but the Fourth Symphony, and that clarinets were now enrolled as a permanent adjunct to the orchestra. Two horns sufficed for them all excepting for the Third, "Eroica," where three are to be found, this being, moreover, the first time that more than two had been employed in symphonic writing by Beethoven.

The orchestral canvas of the Fifth, C minor, presents the coöperation of a piccolo flute, a contra-bassoon, and three trombones; all of these, however, remain silent until the victorious entrance of the Finale. To the Sixth—the Pastoral—are added a piccolo flute and two trombones instead of three, whereas in the Ninth, the usual symphonic cohort is supplemented by a piccolo, a double-bassoon, four horns, three trombones, and human voices. It is worthy of note that this new departure of employing a second couplet of horns in the symphonic scheme concludes the evolution of the classical orchestra. For the incorporation into the concert orchestra of the oboe da caccia, resuscitated in the form of the English horn, of the modern bass-clarinet, of the opheicleide and the usurper of its functions, the bass-tuba, was an outgrowth of the Romantic Movement. Likewise the harp, in spite of its venerable origin and perennial usage, was, during the eighteenth century, an adjunct to the operatic orchestra only, for histrionic effects and historic representations.

The scores of no other composer can be more profitably studied than those of Beethoven, and a high percentage of the examples set forth in all standard treatises on instrumentation are drawn from his works. Apart from the fact that his orchestration not only embodied but improved upon and matured the orthodox style of writing as bequeathed to him by Haydn and Mozart, his pages abound in daring innovations, bold and startling; in subtle combinations, delicate and pathetic; a kaleidoscope of sequent effects now contemplative and restful, now tender and languishing, impetuous and fiery, at times even jocose, weird, bizarre. And throughout is manifested the depth of his nature, the nobility of his purpose.

In writing for the strings, Beethoven attained a degree of excellence that has never been surpassed. He fulfilled every requirement, whether of solidity, sonority, flexibility, or delicacy.[27] With bold and vigorous strokes, he infused warmth and increased vitality into the inner and lower voices, and the quartet being thereby more closely knit together, the resultant effect was that of breadth and power. He was the first to carry the orchestral violins into the ethereal domain of their highest range in the overture to "Egmont." Incomparable is the boisterous string passage toward the close of the "Leonora" Overture, No. 3, as well as the fughetta in the Scherzo of the Fifth Symphony, where the double-basses are for the first time allowed unfettered license.[28] Finally, Beethoven elevated the violoncello once for all to its proper sphere as an emotional and heroic interpreter, of which the C minor Symphony affords a favorite example in that the 'cellos, assisted by the violas, usher in the opening theme of the slow movement.[29] The violas likewise gained in individuality, and in the last movement of the Ninth Symphony even divided viola parts are to be found.