Maybe you'll get a kick out of this too: Circle of 5ths. start at G... One Sharp right? go up 5 whole steps. to D. Two Sharps. 5 more whole steps to A. Three Sharps. 5 more to E. Four. AND so forth and so on in circular fashion. Peace, SingflowerCat Be where you are.
x is the symbol for double sharp, so yes, it's two semitones up, just as bb is double flat. And it is a unique note that only has two enharmonic names. Circle of fifths works in both directions by the way - if you go the other way you get more flats (or fewer sharps) in the key signature. Adding a sharp and taking away a flat, and vice versa, are the same thing when it comes to transposing key signatures, it's just a question of whether the key signature has sharps or flats to start with.
Looks like G#/Ab has only two enharmonic names. Trying to get to it by going a whole tone would make it F# double sharp or Bb double flat (or Gb double sharp or A# double flat ), which aren't in the nomenclature. It's the middle black key in the three grouped black keys on the piano.
Thanks. I'm not really into the notation of music theory too much but rather the physics of music. Notation gets confusing to me sometimes, much the same as math and physics notation gets confusing, even though I understand the basic math and physics concepts.