Harmony note (in this case B, D and F) provide the harmony. In the musical scale, there are twelve pitches. Each pitch is referred to as a "degree" of the scale. The names A, B, C, D, E, F, and G are insignificant. The intervals, however, are not. Here is an example: As can be seen, no note always corresponds to a certain degree of the scale. The "tonic", or 1st-degree note, can be any of the 12 notes (pitch classes) of the chromatic scale. All the other notes fall into place. For example, when C is the tonic, the fourth
Major scale semitone (i.e. whole, whole, half). The major scale is maximally even. \override Score.TimeSignature #'stencil = ##f \relative c' { </score> The scale degrees are: \override Score.TimeSignature #'stencil = ##f </score> The triads built on each scale degree follow a distinct pattern. The roman numeral analysis is shown in parentheses. If a piece of music (or part of a piece of music) is in a major key, then the notes "in" the corresponding major scale are considered "diatonic" notes, while the notes "outside" the major scale are considered "chromatic" notes. Moreover, the key signature of the piece of music (or section)