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III.
THE NAMES OF NOTES
In
Western music, one octave contains 7 main notes.
DO  
RE   MI   FA SOL   LA
   SI
C     D      E    F
    G       A    
B
Which approximately correspond to Vietnamese words:
HÒ    XU.   XU
   XANG    XÊ    CÔNG
CÔ'NG
L U U#
S X
C C#
But
only five notes
HÒ XU. XANG XÊ CÔ'NG
L U
S X
C
Do ré
fa sol la
C D F
G A
are considered as vital.
Vietnamese music is the music of the Far-East
countries and the pentatonic scale is most frequently used.
HO XU. XANG XÊ
CÔ'NG
L U
S
X
C
Do ré fa
sol la
C D F
G A
Notice that this scale has three fixed notes:
HO  XU.  XANG
L U     S
Do ré fa
C D F
and two auxiliary notes collectively known
as “changing tones”.
XU. CÔ'NG
U C
Ré la
D A