The dominant of Db is Ab.
The tonic of E flat major is E flat. Its dominant is B flat and its subdominant is A flat.
The chord symbol for a dominant 7 flat 9 in the key of C major is C7b9.
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.
The key signature that has B flat, A flat, E flat and D flat is Concert A flat Major.
The dominant seventh chord in C-flat major serves as the chord built on the fifth degree of the scale, providing tension and leading to the resolution back to the tonic chord.
The dominant (fifth) degree of a D sharp major scale is A sharp.
Eb
The sub-dominant of Db is Gb.
The fastest method could be a common tone modulation from D-flat to F, which is then the dominant of B-flat. The D-flat moves to C, the A-flat up to A-natural, and the F carries through.
The dominant is the 5th, which in the key of A-flat major is E-flat. Then an E-flat major triad contains the notes E-flat, G, and B-flat.
The tonic of E flat major is E flat. Its dominant is B flat and its subdominant is A flat.
Eb Major
The dominant note for D major and D minor is A.
It depends if you're playing a D flat major or a D flat minor chord. For D flat major, play D flat, F, and A flat. For D flat minor, play D flat, E, and A flat.
The dominant is the 5th tone in the scale. In a D Major scale, the dominant is A.
The subdominant of D major is G major.
D major(D,F#,A,D) for sub domonant, and E major(E,G#,B,E) for dominant