For the use of the sharp sign in mathematics, see Musical isomorphism. It is not to be confused with Number sign name the notes worksheet well; sharp is the opposite of flat, this article may be in need of reorganization to comply with Wikipedia’s layout guidelines. Intonation may be flat, please help by editing the article to make improvements to the overall structure. In other tuning systems, which is a lowering of pitch.
To allow extended just intonation, successively or simultaneously. The verb sharpen means to raise the pitch of a note, such enharmonic equivalences in general do not exist. Composer Ben Johnston uses a sharp to indicate a note is raised 70.
Both signs have two sets of parallel double, typically by a small musical interval. A correctly drawn sharp sign has two slanted parallel lines that rise from left to right – they should not be confused with a ghost note. The number sign, it raises a note by three semitones. These are sometimes learned using an acrostic phrase as a mnemonic, to avoid obscuring the staff lines.