Final answer:
The question seems to be asking for an explanation of a 'ghostly 12 bar theme' in a prelude without specifying the context or work. The provided material suggests that the question speaks to music being used as a narrative element in literature or other artistic expression, contributing to atmosphere and thematic development.
Step-by-step explanation:
The student's question appears to be asking for a detailed description of the 'ghostly 12 bar theme found in 'Prelude'' from a piece of literature or music. However, without a specific context or source material, it is difficult to precisely identify the prelude in question.
Typically, a 12-bar theme would refer to a musical blues progression, but in a literary sense, it could metaphorically describe a recurrent motif or theme across a span of text. Since the provided extracts include musical references and themes, one can infer that each extract features a musical element as a form of expression or setting enhancement. From describing a personal moment with music or the ominous tones accompanying a film scene, to the haunting sounds signaling danger, these excerpts use music as a narrative device to heighten emotion, develop atmosphere, and underscore themes.