Diatonic Semitones and Chromatic Semitones

In the introductory videos to musical intervals, links to which are given in the description of this video, the different types of intervals were studied. In preparation for the study of musical scales, in this video we will consider in more detail the semitone intervals. It will be shown that these intervals have an extension, defined as the ratio between the frequency of the highest note and the lowest note, which assumes two values: one minor and one major. It is also shown that they correspond to notes of different names, in which case they will be called diatonic, and to notes of the same name, unaltered and altered, in which case they will be called chromatic. It is shown that in major scales there are only diatonic semitones with major extension.

Link to the video “Tempered Chromatic Scale”:
   • Tempered Chromatic Scale  

Timecodes
0:00 - Start
0:03 - Introduction.
0:26 - Extension of semitones.
1:02 - Conformation of major scales.
1:45 - First five major scales on stavess.
2:13 - Chromatic and diatonic semitone sequences.
2:53 - Comparison of tempered and non-tempered scales.
4:25 - Marking of semitones on staves.
4:32 - Conclusion.
4:49 - Thanks and consideration.