[Harp-L] 3rd to 7th in the blues

["John F. Potts" <hvyj@xxxxxxx>]

"Bending the 5D will give you a 1/4 tone (interval) below the b7th  
which is not generally used in western type scales which use only 1/2  
or whole step intervals. However, doing this will add a wonderfully  
expressive "blue note" to what you are doing and is very useful. " Buck

I read somewhere that this 3/4 flat 7th is called a "harmonic  
seventh"  or a "blues seventh."  Wherever I read this said that the  
"harmonic seventh" is also commonly used in barbershop quartet  
singing.  Whatever it's called, it sounds pretty good for blues when  
played at the right spot.

JP