1♭

1♭ indicates a key signature with 1 flat. In standard music notation, this is shown at the beginning of the staff, indicating which notes are consistently altered throughout the piece. A common reference key for this signature is F Major.

Keys and modes written with this key signature include A Phrygian, A Phrygian Dominant, B♭ Lydian, D Aeolian Major Tonic, D minor, F Major, G Dorian.

Below is a list of songs written using this key signature.