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- C tower, piano musical notes, cheat sheet. Learning aid to easier find positions for C notes on a piano keyboard, shown with 2 octaves for treble clef and 2 octaves for bass clef. Illustration. Vector Puzzle #447268398
C tower, piano musical notes, cheat sheet. Learning aid to easier find positions for C notes on a piano keyboard, shown with 2 octaves for treble clef and 2 octaves for bass clef. Illustration. Vector Puzzle #447268398