Licenses

1. Music theory content from Open Music Theory Textbook is licensed by Creative Commons BY-SA 4.0
2. Piano lesson content from Piano Playing With Piano Questions Answered is licensed by Project Gutenberg License . Copyright © 1909 by Doubleday, Page and Company; renewed 1937 by J. Hofmann. © 1908 by McClure Company; renewed 1936 by J. Hofmann. © 1920 by Theodore Presser Company; renewed 1947 by Josef Hofmann.
3. Fluid (R3) SoundFont from Frank Wen is licensed by the MIT license
4. The MIDI files from Mutopia are licensed by Creative Commons licenses< /a>.
5. The MIDI files from Bernd Krueger are licensed by cc-by-sa Germany License
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