7th chords

Hi,

Often you will see chords like Cmaj7 or Cm7 and etc.

Basically they are just chords with a 7th note.

As we already know, chords are formed by 1+3+5.

A Major 7th chord will be 1+3+5+7.
E.g Cmaj7 - C + E + G + B

For Minor 7th chord, it will be 1+b3+5+b7
E.g Cm7 - C + Eb + G+ Bb

For Dominant 7th chord, it will be 1+3+5+b7
E.g C7 - C E G Bb

How about Sus 7th chord? It will be 1 +4+5+b7
E.g C7sus - C F G Bb

Trying adding the 7th to your chord now. :)