Then type in “Bb” and you’ll get exactly the same chord position and exactly the same three notes. If you go to the Uberchord chord finder and type in “A#” you’ll get a chord position and the notes Bb, D, and F.

Goode?”Ī theoretical key is a key that exists in theory but doesn’t get used much because it’s so much easier to just use its enharmonic equivalent the notes of the scale all sound exactly the same, the key just has a different name and key signature. What could be a happier underdog song than Chuck Berry’s B-flat rocker “Johnny B. A key has only seven notes, so some of those sharps have to double up the sixth note, for example, is F#, which actually makes it a G.īecause these double sharps make everything so darned complicated, and because the same key scored as B-flat has only two flats, guess which key signature most composers are going to pick? It’s because of this that A-sharp is referred to as a theoretical key and usually left to collect dust on the shelf. The key of B-flat guitar could also known by its enharmonic equivalent, A-sharp, if A-sharp didn’t have a whopping ten sharps. A-Sharp Major / B-Flat Major: The Pollyanna of the Music World

B major flat major scale