[staff] key number (key number identification position | key number marking list | a major key identification principle | F, C, G position marking ascending | F major key identification principle | B

One 、 a key signature

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1、 Key mark position

The key is in Clef Right side representation , If not , said C transfer ;

Treble clef , Bass clef ;

There is no key sign on the right side of the clef of the staff below , The default is C Natural major or A Nature minor ;

2、 List of key marks

Staff Clef right , Can be set up Different number A rising sign # or Descending sign b , Indicates the current key number , As shown in the figure below :

3、A The principle of major identification

Specific modulation identification principle , And Key note reasoning , With A Take major as an example , There are three rising signs to the right of the treble clef # , These three rising signs # Respectively in F / C / G Pitch ;

The notes under the treble clef are as follows : F4 On the fifth line , C4 In the third room , G4 Add a room on , So in these places # A rising sign , It means meeting these sounds , Then rise a half tone , This is a A The rules of major ;

stay A In major , If in F、C、G Position mark rising sign # , In the staff , No more marking A rising sign # 了 , In this staff , Any encounter F、C、G note , By default, it is raised by one half tone ;

4、F The principle of major identification

F In major , To the right of the treble clef The third line B3 The note position has a Descending sign b , It means that F In major , Any encounter B note , Drop a half tone ; Other than B The notes outside remain the same ;

B3 The notes are Treble clef The third line , stay B The position is marked with a Descending sign b , therefore stay F In major , Anyone who encounter B note , Drop a half tone ;