The Notes page. Paragraphs in this page are: The 12 Notes The 12 notes There is nothing easier than looking at a modern piano keyboard and understanding the material that is used nowdays. Note on notes: We are looking at the Western European Music notes. Nothing more, nothing less. Let's overcome the initial confuse while looking at all of them. The notes are much less than what we see, because they are repeating in octaves. The Piano Octave The 7 white keys are the Natural Notes: Do Re Mi Fa Sol La Si or C D E F G A B We can easily notice the Natural whole tones and semitones. Natural semitones are between the white keys that are adjustent: E-F and B-C (Imagine the octave repeat) The Natural tones are: C-D D-E F-G G-A A-B Do Re Mi Fa Sol La Si C D E F G A B Now, about accidentals. Sharp "#" raises a tone by a semitone, double sharp "X" raises it by a whole tone. Flat "b" lowers a tone by a semitone, double flat "bb" lowers it by a whole tone. Between C and D there is C# or Db Between D and E there is D# or Eb Between F and G there is F# or Gb Between G and A there is G# or Ab Between A and B there is A# or Bb Because we are talking about the Well Tempered Tuning, all semitones are equal and all whole tones are equal to 2 semitones. Considering pitch, C# is same to Db D# is same to Eb F# is same to Gb G# is same to Ab A# is same to Bb B# is same to C Cb is same to B E# is same to F Fb is same to E G## is same to A AX is same to G But considering wider musical issues, tones can not "change" names just because they would have the same pitch again. As we will see in other pages, intervals and modes-scales are created using specific tones, therefore notes. The G Major Scale has F# inside and not Gb. The B minor Scale has C# inside and not Db.