HI, I have a major doubt about musical scales! See, the harmonic scale is composed of all the 12 notes in the music. And what are other scales! They are just the combination of some particular notes out of those 12 notes. So, in the sense harmonic scale is the father of all the other scales. Now my question is if we already had a scale(which is really basic and really easy to learn) then what was the need to invent the other scales?? Ok i think i can invent one more scale right now den! the scale name would be "nonatonic scale" and it would take some particular 9 notes from the harmonic scale. would this be considered a scale in musical theory? If not, why not and then what makes "pentatonic scale" so famous then(what speciality it has that is not there in my "nonatonic scale")? And if yes, then I have studied "Permutations and Comnbinations" in 12th standard Thanx. I hope my doubt is cleared here!