Double cross (musical notation)
The double cross ( ) in music denotes the increase of a root note by two semitones . The ending -isis is added to the tone name of the unaltered tone . The sign is shown in print as an inclined cross with square thickenings ( serifs ) at all four ends, but is handwritten as a simple x. It is written either on a line or a space on the staff and alters the note on that pitch. If the tone to be raised is on an auxiliary line , the double cross is placed in front of the auxiliary line.
The symbol is used as an accidental and is only valid in the measure in which it is notated and only in the notated octave range . In contrast to the simple cross ( ♯ ), it is typically not used as a sign . There are a few exceptions in new music . For example, the last passage of John Foulds ' World Requiem is correctly notated in G sharp major (G ♯ , A ♯ , H ♯ , C ♯ , D ♯ , E ♯ and F ), with the necessary pound sign also appearing at the beginning of the line.
Representation in computer systems
In the international Unicode character coding system , the ? is in position:
- U + 1D12A
but this is not displayed correctly on all computer systems.