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Abstract
This dissertation describes the development and testing of a software application known as The Intonation Machine. This application was designed as a Method of Adjustment style tool to be used by music educators and music education researchers as both a data gathering instrument used measure participants’ ability to resolve two sinusoidal tones to a unison, and as a pedagogical tool to help participants improve their basic pitch sense through the aural detection and resolution of beat-interference. Literature regarding intonation perception and performance, intonation pedagogy, additional psychological factors, and ancestor technologies are reviewed. The research methodology known as Software Development as Research is used as a framework for the development of the key components of the application. These key components and their functions are described and used to develop a working piece of software. Qualitative data regarding the software was collected from three stakeholder groups (music educators, music education researchers, and music students) and was assessed regarding a number of factors such as ease of use and usefulness for education and research, with a majority of participants reporting the software to be useful for their stakeholder group and relatively easy to use. The implications and potential uses of this software are discussed. The application has been made available for free, and can be found at the URL https://pastebin.com/PBSrtbij.