There’s an interval so dissonant that it’s earned the nickname ... An interesting part of this story is that not all accidentals were created at the same time – F-sharp and B-flat were the first ones, ...

After A sharp, if you were to go one note higher again, you would arrive at B. If we need to differentiate the A from its sharpened version, we call it ‘A natural’. The interval between a natural note ...