Diatonic scale topic

In music theory, a diatonic scale (from the Greek διατονικος, meaning "[progressing] through tones", also known as the heptatonia prima and set form 7-35) is a seven note musical scale comprising five whole steps and two half steps, in which the half steps are maximally separated. Thus between each of the two half steps lie either two or three whole steps, with the pattern repeating at the octave. The term diatonic originally referred to the diatonic genus, one of the three genera of the... full article at wikipedia