MAJOR 7th
(sym.-Dma.7,Gma.7,etc...)
1-3-5+7

The numbers chart reads to make a major 7th from the root, all you have to do is add the 7th tone.

All you have to do now is find the 7th tone! That's what the numbers chart does best, it helps to locate where you are on the one-way street's in music city.

Using the D as the root chord, locate the 7th tone on the numbers chart.

Right under the column number 7 on the line "Scale / key -- D", the note you will see is C#.

So the 7th has to be "added" to the root note's D-F#-A, to get a D major 7th.

The note's in a D major 7th chord are; D-F#-A-C#.

Using the numbers chart let's do an A major 7th.

If the pattern is 1-3-5 +7 tone, then an A major 7th chord has the note's A-C#-E-G#.

SEVENTH CHORDS
(sym.-C7,F7,etc.)
l-3-5+ b7th

Seventh chords are built by adding the b7th tone.

Using the F major chord (1-3-5 in the key of F)as the root, locate the 7th tone on the numbers chart.

The 7th tone for an "F" chord is E. Before we can add this seventh tone it must be lowered one half-step or flatted. The seventh tone for the F7 now becomes an Eb. If the note's are written down they would read F-A-C-Eb for an F7 chord.

Let's do a G7! The root is 1-3-5 in key of G or G-B-D. The 7th tone is an F#, but when it is flatted a half-step it becomes an F.

So the note's for a G7 are G-B-D-F.

Please continue to work out these chords on paper to fully understand and have a greater knowledge of music and your instrument.