Music is an art form that has existed in societies for thousands of years. Many people who are interested in further appreciating music beyond just listening to it, study the subject of music theory. From a technical stand point, much of music theory focuses on analyzing and understanding the harmonic structures of compositions through transcription and musical analysis. The most fundamental harmonic structure is a chord. My goal was to create a device that is as portable as a guitar tuner that is able to perform chord detection, creating a very useful tool for musicians. Using a Raspberry Pi Model B+ for data acquisition, a USB-Soundcard for receiving acoustic input, and a LCD screen for displaying the output, I was able to create a stand alone device that is able to accurately detect the 12 basic major and minor triads as well as the 12-notes in the western 12-tone music system.
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