A 6th chord is a chord where a major triad and the additional sixth interval is major (major sixth chord). For example, a major sixth chord built on C (denoted by C6, or CM6) consists of the notes C, E, G, and the added major sixth A . These are the same notes as those of an A minor seventh chord – whether such a chord should be regarded as an added sixth chord or a seventh depends on its context and harmonic function.
(the audio example is D7 with it’s root found on
You can determine the name of the chord when the root
(lowest) note is played on the frets in the chart below:
Here is a poplular alternative way of playing the A style
6th barre chord. It’s the same form with the exception
of the missing note on the 5th string. It used a lot because
it’s an easer fingering than the full barre chord.