Composition with Twelve Tones:
The method of composing with twelve tones grew out of a necessity. In the last hundred years, the concept of harmony has changed tremendously through the development of chromaticism. The idea that one basic tone, the root, dominated the construction of chords and regulated their succession – the concept of tonality – had to develop first into the concept of extended tonality. Very soon it became doubtful whether such a root still remained the center to which every harmony and harmonic succession must be referred. Furthermore, it became doubtful whether a tonic appearing at the beginning, at the end, or at any other point really had a constructive meaning. Richard Wagner's harmony had promoted a change in the logic and constructive power of harmony. One of its consequences was the so-called impressionistic use of harmonies, especially practised by Debussy. His harmonies, without constructive meaning, often served the coloristic purpose of expressing moods and pictures. Moods and pictures, though extra-musical, thus became constructive elements, incorporated in the musical functions; they produced a sort of emotional comprehensibility. In this way, tonality was already dethroned in practise, if not in theory. This alone would perhaps not have caused a radical change in compositional technique. However, such a change became necessary when there occurred simultaneously a development which ended in what I call the emancipation of the dissonance.
The ear had gradually become acquainted with a great number of dissonances, and so had lost the fear of their "sense-interrupting" effect. One no longer expected preparations of Wagner's dissonances or resolutions of Strauss' discords; one was not disturbed by Debussy's non-functional harmonies, or by the harsh counterpoint of later composers. This state of affairs led to a freer use of dissonances comparable to classic composers' treatment of diminished seventh chords, which could precede and follow any other harmony, consonant or dissonant, as if there were no dissonance at all.
What distinguishes dissonances from consonances is not a greater or lesser degree of beauty, but a greater or lesser degree of comprehensibility. In my Harmonielehre I presented the theory that dissonant tones appear later among the overtones, for which reason the ear is less intimately acquainted with them. This phenomenon does not justify such sharply contradictory terms as concord and discord. Closer acquaintance with the more remote consonances – the dissonances, that is – gradually eliminated the difficulty of comprehension and finally admitted not only the emancipation of dominant and other seventh chords, diminished sevenths and augmented triads, but also the emancipation of Wagner's, Strauss', Moussorgsky's, Debussy's, Mahler's, Puccini's, and Reger's more remote dissonances.
The term emancipation of the dissonance refers to its comprehensibility, which is considered equivalent to the consonance's comprehensibility. A style based on this premise treats dissonances like consonances and renounces a tonal center. By avoiding the establishment of a key modulation is excluded, since modulation means leaving an established tonality and establishing another tonality.
The first compositions in this new style were written by me around 1908 and, soon afterwards, by my pupils, Anton von Webern and Alban Berg. From the very beginning such compositions differed from all preceding music, not only harmonically but also melodically, thematically, and motivally. But the foremost characteristics of these pieces in statu nascendi were their extreme expressiveness and their extraordinary brevity. At that time, neither I nor my pupils were conscious of the reasons for these features. Later I discovered that our sense of form was right when it forced us to counterbalance extreme emotionality with extraordinary shortness. Thus, subconsciously, consequences were drawn from an innovation which, like every innovation, destroys while it produces. New colorful harmony was offered; but much was lost.
Formerly the harmony had served not only as a source of beauty, but, more important, as a means of distinguishing the features of the form. For instance, only a consonance was considered suitable for an ending. Establishing functions demanded different successions of harmonies than roving functions; a bridge, a transition, demanded other successions than a codetta; harmonic variation could be executed intelligently and logically only with due consideration of the fundamental meaning of the harmonies. Fulfillment of all these functions – comparable to the effect of punctuation in the construction of sentences, of subdivision into paragraphs, and of fusion into chapters – could scarcely be assured with chords whose constructive values had not as yet been explored. Hence, it seemed at first impossible to compose pieces of complicated organization or of great length.
A little later I discovered how to construct larger forms by following a text or a poem. The differences in size and shape of its parts and the change in character and mood were mirrored in the shape and size of the composition, in its dynamics and tempo, figuration and accentuation, Instrumentation and orchestration. Thus the parts were differentiated as clearly as they had formerly been by the tonal and structural functions of harmony.