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- Middle C on a piano keyboard, learning aid and cheat sheet. Diagram of two octave sections, for treble clef and bass clef, on keyboard and grand staff, the Middle C in red color. Illustration. Vector. Mouse Pad #447268404
Middle C on a piano keyboard, learning aid and cheat sheet. Diagram of two octave sections, for treble clef and bass clef, on keyboard and grand staff, the Middle C in red color. Illustration. Vector. Mouse Pad #447268404