Barre chords while difficult at first, are definitely doable with practice. Knowing the correct technical requirements can help speed up the playing process. So when it comes to barre chord playing, tips are always welcome.
In a Nutshell
Knowing how to play barre chords can open up new areas of possibilites for
your chord playing. They allow us to transform open chords (chords with
open strings) into closed chords (chords with no open strings). Closed
chords are transposable, which means they can be moved across the fretboard.
This opens up new chords which cannot be played in open position.
A barre chord refers to a type of chord shape that consists of a finger (typically the index finger) placed across more than one string which creates a barre. The index barre is the most common which is placed behind the open chord shape.
The index finger barre placed behind the open chord shape closes all open strings found within that open chord. By cancelling out the open strings we now have movable chords that have the mobility to be played across the fretboard.
Dynamic Capo
We can correctly think of our barre as capo that is dynamic; being able to
cover any number of strings and also movable across the fretboard. The strong
clamp action that is similar to a capo is created by both the barred index
finger and thumb behind the neck.
Having the ability to transpose what was originally an open chord into a closed chord allows us to play chords which could previously not be played in open position.
The concept of how barre chords is quite simple, although it is physically more challenging to play than open chords. Playing barre chords involve a few technical considerations that require attention. Below specifically looks at the physical mechanics associated with playing barre chords, looking at the index finger and the thumb in particular.
Technique
All other fingers in the shape should follow the same technical method
discussed in General Technique Tips.
Your index finger should be pressed flat across only the amount of strings
necessary with the tip of your finger slightly over the string.
Your index finger should be slightly rotated anti-clockwise so you are using
somewhere inbetween flat part of your finger and the side of your finger. This
creates more room for the other fingers.
Pressure is not necessarily evenly placed across all strings - only for strings that are
required pressure. This is because any note that proceeds the barre on the same string
will cancel out the barred note.