How harmonics look in tablature and standard notation
Notation for guitar is far from being standardized. Here are
some of the ways that you will see natural harmonics written in
both tablature and standard notation.
 |
The diamond around a fret number indicates a
harmonic in tablature. |
 |
Harm stands for, your guessed it, harmonic. |
 |
N.H. stands for natural harmonic. |
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--<12>--
|
In tablature found on the web, the number is
surrounded by <> which is the closest thing to a diamond
in plain text. |
 |
In standard notation the note heads are written
as diamonds. The line or space that the note is written on
is not the pitch being played. Instead, this is the note that
would sound if your where to play the note normally at that
fret. Some indication would have to be made as to which string
this would be on. |
Page 1, introduction to natural harmonics on the guitar
Page 3, more on playing natural
harmonics on the guitar 
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