That's a quick sort of TAB notation, Mel, in which the numbers represent frets on the guitar, the X's indicate a muted string.

Notewise, the 3X0033 represent the G two octaves below middle C, the D above it and the G below middle C, with the D above middle C and then the G above middle C, making one big giant G5 that has three G's and two D's in it.

Working with both guitar and keyboard as well as trumpet has given me a lot of insight into chord voicings. Being able to voice chords that typically only guitarists might play opens up a lot of things to do with the lefthand piano comping that might not be so obvious when dealing with "just" the keyboard patterns.


--Mac