The purpose of this interpretive case study was to explore--through a close analysis of one class project--students' use of audio signs and the teacher's scaffolding of the use of audio signs. Two research questions guided this study: (a) In what ways did the fifth-grade students use audio signs, specifically transitions sounds, when constructing multimodal texts with different sign systems (e.g., visual, linguistic or audio signs)?; (b) In what ways did the classroom teacher shape the specific social cultural environment for audio sign use? The findings of this study argue for professional development opportunities for teachers where they not only learn how to use various software programs but also learn the content knowledge necessary for communicating with multiple signs such as audio. (Contains 2 figures.)