The commercial pressures of modern film scoring are historically comparable to the conditions of 1640s Venetian opera. Just as film composers are often brought in at the last minute, 17th-century composers were frequently required to set full-length dramas under extreme time constraints. To meet these demands, they depended heavily on preexisting conventions and improvisatory formulas.
Modern thinking often treats improvisation and composition as separate skills. In the classical tradition, however, to improvise is simply to compose at the speed of thought. Music theory is the discipline that seeks to identify and articulate the rules and techniques that enable us to think musical thoughts clearly and beautifully. Andreas Werckmeister explicitly argued that serious musicians gain more by creating music ex tempore on the clavier than by relying strictly on written tablature. Historical evidence supports this view: Johann Nikolaus Forkel reported that Johann Sebastian Bach’s extemporaneous fantasies were often freer, more brilliant, and more expressive than his written compositions.
Written composition separates musical conception from physical execution. In improvisation, by contrast, conception and realization occur simultaneously. When a composer watches a film, the visual stimulus demands an immediate, visceral response. This is the fundamental reason film scoring exists: to transform a recording of actors, which is contingent and fleeting, into a dream of humanity, which feels essential and ordered.
True improvisation depends on a strict internal grammar, not on guesswork. A master composer relies on internalized techniques to generate large-scale forms instantly, just as Dieterich Buxtehude could develop complete improvisatory works from a single sequential subject. The goal of the musical artwork is to reproduce the ontological density of a lucid dream: to remove the noise of reality and create an acoustic world in which every sound is structurally necessary and emotionally absolute. Without mastery of voice-leading, harmony, and counterpoint, a composer will freeze under deadline. The work succeeds precisely when it feels more real than reality, because it achieves the purity and coherence of a dream.
This is the essential pedagogical filter for the self-taught film composer. To survive the extreme deadlines of the industry, you must learn to respond ontologically to the image through improvisation. To improvise well, you must first master the fundamental rules of classical composition and cultivate strong musicianship.