I'm reading a book on music theory, and itwhich says that a diatonic scale is any seven-note scale that uses the notes ABCDEFG in an arrangement of 5 tones and 2 semitones.
I wanted to clarify one point.: Consider the scale G major. It has one sharp, F#. Is it still a diatonic scale? Can a diatonic scale have sharps and flats?
If G major is a diatonic scale, then I assume that all major scales, and all minor scales, are diatonic.