A small music tool to detect simple chord (maj, min, 7) and change speed in real time while playing a preloaded mp3 song. Although I have better chord analyzer tool for learning guitar, I want to make one to see how it works, and realized that even to detect simple chords is a quite hard job.
I am happy that B4J can make applications run quite fast for signal processing tasks and make UI much easier.
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If you want to try: java -jar Mp3muser.jar (using java version "1.8.0_202", may have many bugs)
