Emotions, feelings, and affect lead to moods and even to the sublime in screen composing. The train horn in the performance links environments and moods with feelings, adding an element of velocity and situated sound that flows into the composition without words. Affective speculation plays out as discursive limits give way to owls and trains.
Digital tools raise questions about technical knowledge needed to compose. Literacy requires knowing about the shaping forces of tools and materials. Tool building turns teachers into shapers.