What do the white diamonds mean?

The white diamonds that are within some of the notes indicate another special quality found within the guitar string at or very near that fretted note location. By tapping the string lightly over the nearest fret forward you will hear a very clear tone called a harmonic. The exact location that you must tap on the string is called a harmonic nodal point.

To show you the exact nodal point would require a lot more explanation than we can explain in this short section and it’s a bit advanced for a beginning guitarist but we thought we would include references to the general vicinity along the strings where common harmonics can be heard.

Each note that you hear when you tap one of these nodal points is a note which will fall within the actual scale of the particular Map you are using. That is why you will also notice that the harmonic nodes in the Em and Cmajor Maps are not the same.

As you become a better guitar improviser, playing a couple harmonic notes really adds depth and texture to your playing.