In reply to the questions that appear from time to time regarding theoretical concepts. i.e. why is there no C flat? Why do some keys have sharps or flats? The answers that appear on the list are thorough and accurate and hopefully valuable to the questioner. I think a course of study, preferably on piano with an instructor would be more beneficial then struggling step by step with questions that come up in a haphazard manner. The piano provides a good visual picture of the theoretical conditions. Example: Each adjacent key is a half step. E to F and B to C confuses people in my opinion because they proceed alphabetically in a straightforward fashion. But, it is easy to see there is no black key between them and therefore they are a half step apart. Once understood this is simple enough. Yet, my students ask this question all the time and it takes more then one pass at the explanation for the student to see this clearly. I think it boils down to taking your musicianship seriously.There is no substitute in my opinion for serious study.