Having effective left
hand technique means being able to finger a wide variety of musical
ideas when improvising, at a variety of tempos. On guitar, unlike many other instruments, the
fingering patterns involved in playing scales are different than
those involved in playing arpeggios. This means that you have to
practice both.
Scales generally involve
playing more than one note on each string. Arpeggios usually necessitate
playing one note per string with two notes on one of the strings
involved, as in the following example:
One
of the first questions to arise is: How do you finger the two notes
at the fifth fret? Funny you should ask that. I have a definite opinion
about that very question. When playing consecutive notes at the same
fret, generally use the longer finger (middle) to play the note on
the lower string, as in the following:
1
= Index 2 = Middle 3 = Ring 4 = Little
When
you have three or more notes at the same fret, use logic to determine
what is the most useful finger to play the last note in the arpeggio
and work backwards from there:
Since
the arpeggio ends up at the eighth fret using the Little finger, it
makes sense to play the E at the fifth fret with the Index finger,
the C with the Middle finger and therefore the low G with the Index.
To
practice using the Middle finger to play the lower note, play this
simple exercise, which I feel is the most important single thing to
practice to improve left and right hand technique:
What
about using a barre to play the notes?
Using a barre (the same finger laid across the fretboard) has two
problems associated with it:
1) It can result in inconsistent time when you plant one finger with
enough pressure to play two notes cleanly in the middle of an eigth
note line.
2) You run the risk of injury (other than barre chords a different
subject). In effect what you are doing is bending your finger the
wrong way, then applying pressure. Repeat a thousand times a day for
20 years and you could develop tendon problems. Since everyone has
different physiology, it is not a given that this will happen
the question you have to ask yourself is "Do I feel lucky?"