AbstractOnline teaching and learning technologies become widely advocated and employed in higher education, researcher attempts to understand the suitability of such technologies in student learning. This paper presents a research study conducted in blended learning mode to design interactive online application of learning Music Theory. This discussion focuses on the appropriateness of selected content, instructional design, and technical aspect incorporated into authoring software with an option for interactivity and admirable support for audio video. In an interactive and effective design, a variety of media techniques including text, sound, pictures, video clips and animation were used to present the content of the Music Theory lesson. It included three development phases using the ADDIE instructional design model which can begin interactively to reinforce and test the self-learning of students. This study also involved the procedure of integrating the online interactive application of lear.....