Original: More specifically , in music notation , flat means , '' lower in pitch by a semitone ( half step ) , '' and has an associated symbol ( ) , which is a stylised lowercase '' b '' '' Musical Symbols on Concrete Blockers : Music Symbols History '' , Homepage of Maddy and Maverick : HighHopes.com .
Simplified: In music notation , flat means '' lower in pitch by a semitone ( half step ) , '' and has the symbol ( ) Music .