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Problem happened in making xylophone (record & playback) - MIT App Inventor Help - MIT App Inventor Community
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The my piano app template does not have the media files with the notes - MIT App Inventor Help - MIT App Inventor Community
MIT App Inventor on Twitter: "We are delighted to announce the publication of Become an App Inventor: The Official Guide from MIT App Inventor by K. Lang and S. Tezel. Published by @
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