This article asserts that auditory cues can be categorized by rhetorical function into the categories of visual rhetoric, defined by Amare and Manning under Peirce’s Ten Classes of Sign, understanding visual rhetoric to include both images and text. This article expands this definition to aural-visual rhetoric, including auditory elements as visual rhetoric to analyze multimodal Technical and Professional Communication (TPC), demonstrating this method using the opening tutorial scene from Portal 2.