Fa double bémol

The double flat symbol is the equivalent of two flats. A flat sign lowers a note by one half step, and a double flat sign lowers a note by two half steps (one whole step or a tone).

The first note is a C sharp and the second one is a C double sharp. So what does a double sharp do. Well it does what it sounds like it sharps the note twice meaning.

Also note that sharps and flats in key signatures affect all notes of that letter-name, not just in that specific octave. So if you have two flats, it means that all Bs are B-flats, and all Es are E-flats, regardless of octave.

In music, flat (Italian bemolle for "soft B") means "lower in pitch". Flat is the opposite of sharp, which is a raising of pitch. In musical notation, flat means "lower in pitch by one semitone (half step)", notated using the symbol ♭ which is derived from a stylised lowercase 'b'.

And a double flat. Remember n harmonic notes. This b double flat will sound the same as a the e double flat will sound the same as d. And a double flat will sound the same as g.

So they're not like terribly. Difficult but we do have to get used to reading them. And get used to playing them.

Therefor, an F double sharp is one which is increased by 2 semitones. As there are only 2 semitones between f and g, an f double sharp would be enharmonically equivalent to a g! On a keyboard and in Equal Temperament it is in the same place as “g”.

So C double sharp is. The same as D it sounds the same it is fingered the same now. They are those of you that are gonna be like no it's not the same nerd. There's like gentle nuances.

B-flat major B-flat major is a major scale based on B♭, with pitches B♭, C, D, E♭, F, G, and A. Its key signature has two flats. Its relative minor is G minor and its parallel minor is B-flat minor.

B♭ major Key Signatures

The easiest way to figure out the key of a song is by using its key signature. The number of sharps/flats in the key signature tell you the key of the song.

The ♭ symbol universally indicates a flat note. It tells a player to sound a pitch half a tone lower than the written note. For instance, the following image indicates the note A♭ on the treble clef.