Recently I have increased my study of musical scales with ever more detail. One thing that confuses me a certain term I use "natural." Most scales have the same pattern of intervals ascending as it is descending (Diatonic, for example.) if they have the same pattern ascending and descending, is this what is called "natural?"
Also if so, can all twelve tonic scales have a "natural" form with its pattern of tones and semitones? What are they? And is the amount of modes in each scale the same number of tonics(like pentatonic has 5, hexatonic, 6 modes)?