Originally Posted by: Cryptic ExcretionsWhat ever you've been reading, it's just flat out wrong. That is simply not true, and that's what I've been trying to stress all this time.

Accidental = # (sharp) or b(flat)
That's absolutely it. Nothing more, nothing less. Anyone that tells you otherwise is not telling you the truth. My source will be this. http://www.musictheory.net/lessons/html/id20_en.html
Read what this lesson tells you. That is what an accidental is. Accidentals have no effect what-so-ever on what determines a diatonic scale. They're a completely different thing. Of all of the books I've read on music theory, I've never read anything that has disagreed with this.

Again, there is no diatonic scale pattern. Diatonic isn't a scale. It's just a word with a definition.http://dictionary.reference.com/search?q=diatonic There are no compositions in D Diatonic because there is no diatonic scale pattern.

The scale you're thinking of is C Major. The Major scale is the scale that is used for the blueprint of everything and C Major has no accidentals and because C Major has 2 half steps and 5 whole steps in its interval structure, it is also a type of diatonic scale, but it is not the diatonic scale because there is no interval structure called diatonic. That is it.

Diatonic scale= Seven note musical scale comprising five whole tone , and two half tone steps, in which the half tones are maximally seperated.

Accidentals= Notes that do not lie in the scale of the Key.

Now I am sure there are a million diffrent ways of thinking of this, but man, are you trying to help me with my question, or show me not worthy to even ask?