That's hard to say. Thousands of people could claim to have invented it. Probably the person who invented the piano. But that's another question.
15 different key signatures exist. (no sharps or flats) = C major F sharp= G major F C sharp = D major F C G sharp = A major F C G D sharp = E major F C G D A sharp = B major F C G D A E sharp = F # major F C G D A E B sharp = C# major B E A D G C F flat = C flat major B E A D G C flat = G flat major B E A D G flat = D flat major B E A D flat = A flat major B E A flat =E flat major B E flat =B flat major B flat = F major
D flat major, or b flat minor. The flats are B, E, A, D and G, in that order.
B-flat
B flat Major has 2 flats and G Minor has 2 flats.
2 flats B-flat and E-flat
The mediant of B flat major is D.
B flat major, with keys B flat and E flat
B flat Major G minor E flat Major F Major
There are two flats in the key of B flat major: B flat and E flat.
15 different key signatures exist. (no sharps or flats) = C major F sharp= G major F C sharp = D major F C G sharp = A major F C G D sharp = E major F C G D A sharp = B major F C G D A E sharp = F # major F C G D A E B sharp = C# major B E A D G C F flat = C flat major B E A D G C flat = G flat major B E A D G flat = D flat major B E A D flat = A flat major B E A flat =E flat major B E flat =B flat major B flat = F major
Every key signature that has flats has a B flat. These keys are: -F Major (Also D Minor and G Dorian) Has only B flat. -B flat Major (Also G Minor and C Dorian) Has B flat and E flat. -E flat Major (Also C Minor and F Dorian) Has B flat, E flat, and A flat. -A flat Major (Also F Minor and B flat Dorian) Has B flat, E flat, A flat, and D flat. -D flat Major (Also B flat Minor and E flat Dorian) Has B flat, E flat, A flat, D flat, and G flat. -G flat Major (Also E flat Minor and A flat Dorian) Has B flat, E flat, A flat, D flat, G flat, and C flat. -C flat Mojor (Also A flat Minor and D flat Dorian) Has B flat, E flat, A flat, D flat, G flat, C flat, and F flat.
B flat C D E flat F G A B flat
B-flat and E-flat are found in B-flat major and G minor.
b flat, c, d, e flat, f, g, a, b flat
D flat major, or b flat minor. The flats are B, E, A, D and G, in that order.
B flat
B-flat