[staff] diacritical mark (ascending sign | descending sign B | double ascending sign x | double descending sign BB)

One 、 Diacritical marks

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1、A3 note

A3 note , pitch 69 , frequency 440 Hz , stay Treble clef staff Second room ;

stay Treble clef in , The following note is Quarter notes A3 note ,

2、 A rising sign

by A3 Add notes A rising sign # Symbol , That is to add # Symbol , Turned into #A3 note , stay A3 A semitone is added on the basis of , Pitch by 69 Promoted to 70 , frequency 466 Hz ,

3、 Descending sign b

by A3 Add notes Descending sign b Symbol , That is to add b Symbol , Turned into bA3 note , stay A3 A halftone is lowered on the basis of , Pitch by 69 Reduced to 68 , frequency 415 Hz ,

4、 Re rising sign x

by A3 Add notes Re rising sign x Symbol , That is to add x Symbol , Turned into xA3 note , stay A3 Two semitones are added on the basis of , Pitch by 69 Promoted to 71 , frequency 494 Hz ,

5、 Heavy descending sign bb

by A3 Add notes Heavy descending sign bb Symbol , That is to add bb Symbol , Turned into bbA3 note , stay A3 Two semitones lower than , Pitch by 69 Reduced to 67 , frequency 392 Hz ,