A key signature is the placement of sharps or flats at the beginning of a piece of music which determines what the key of a song is and unlike the time signature it is repeated every line; here is a list of all the possible keys you can write in:
C Major/a minor (no sharps and no flats)
Sharp Keys:
G Major/e minor (1 sharp)
D Major/b minor (2 sharps)
A Major/f♯minor (3 sharps)
E Major/c♯minor (4 sharps)
B Major/g♯ minor (5 sharps)
F♯ Major/d♯ minor (6 sharps)
C♯ Major/a♯ minor (7 sharps)
Flat Keys:
F Major/d minor (1 flat)
Bb Major/g minor (2 flats)
Eb Major/c minor (3 flats)
Ab Major/f minor (4 flats)
Db Major/bb minor (5 flats)
Gb Major/eb minor (6 flats)
Cb Major/ab minor (7 flats)
The key signature indicates which notes are sharp, natural, or flat. Every key has a specific signature.
It comes before the time signature. The clef comes before the key signature.
D major has a key signature of F sharp and C sharp D minor has a key signature of B flat
There is no key signature that has Bb and C#.
The key signature will come right after the clef on a staff.
A minor has no key signature.
All songs have a key signature.
The key signature of E minor is F#.
The time signature is the time and beat of the song, and the key signature is what major or minor it is in
The key signature indicates which notes are sharp, natural, or flat. Every key has a specific signature.
It comes before the time signature. The clef comes before the key signature.
3/4 is a time signature, not a key signature.
D major has a key signature of F sharp and C sharp D minor has a key signature of B flat
There is no key signature that has Bb and C#.
There can be a total of seven flats (or sharps) in a key signature.
The key signature will come right after the clef on a staff.
There are no sharps or flats in the key signature of C Major.