A flat major and its relative minor are key signatures with four flats.
There can be a total of seven flats (or sharps) in a key signature.
1, Bb.
The key of G-sharp minor has 5 sharps (it's the relative to B major). G-flat minor is a key that only exists in theory, because that key signature would contain 9 flats. The limit on flats or sharps in a key is 7.
One, Bb. 1, the flat is B flat.
B flat, E flat, A flat, D flat, G flat, C flat, F flat. It's the opposite order to that of the sharps in a key signature.
4 sharps.
There can be a total of seven flats (or sharps) in a key signature.
The key signature with 7 flats is the key of C-flat major.
The key signature with six flats is the key of G-flat major.
The key with 6 flats in its key signature is the key of G flat major.
The scale that has two flats in its key signature is the key of Bb major.
The scale with 2 flats in its key signature is the key of Bb major.
None. No key signature contains a mix of flats and sharps.
The key signature for a piece written in the key of six flats is G flat major.
The key signature of a musical scale with two flats is Bb major.
The key with three flats (Bb, Eb, Ab) is the key of Eb.
In music notation, having 4 flats in the key signature indicates that the piece is in the key of E-flat major. The flats are placed on specific lines or spaces of the staff, representing the notes that are consistently lowered by a half step throughout the piece. In the case of E-flat major, the flats are B-flat, E-flat, A-flat, and D-flat. This key signature simplifies the notation by indicating which notes are flat without having to notate them individually throughout the score.