When learning scales, you not only need to memorise how their patterns
form on the fretboard, but also which chords they work over.
When you
begin exploring how scale tones interact with the chords you're playing
over, you soon realise that certain tones within the scale don't fit as
well as others. These dissonant or non-chord scale tones are commonly
known as passing tones
and, as you'll hear, we can still use them, just in a different way.
In this lesson I'm going to show you how to identify these passing
tones so you can then work on integrating them more effectively and fuidly
in your
solos. This is as much an ear training exercise as it is a
theory
lesson.
Remember, you can learn many scales in the scales
section, and each have their own "passing tones" but I'll
show you some specific examples here as we go.
Identifying passing tones in guitar scales
Let's start with the major scale. It always seems the most logical
place to begin when studying scales.
1W2W3H4W5W6W7H1
We can see that the major scale consists of 7 tones. We can also
tell from the existence of the major 3rd
that this scale will work over major chords (although the name "major
scale" is a bit of a giveaway!).
Now, when getting to know scales, one method I find useful is to record
myself playing a backing chord in the same key and then playing each
tone from the scale over that chord to hear how they harmonise as
individual notes.
In this example, we're using the B
major scale over a B
major chord (this means our scale root needs to be on B),
playing each of the tones of the major scale
from 1 to 7.
What this will do is train your ear to pick out any scale tones that
don't sit right over its root chord, known as non-chord tones, so
when you come to soloing, you will treat these as passing tones,
which I'll explain how to use in a minute.
There is another way to
identify these tones without hearing anything, but actually hearing the
difference between dissonance and harmony is really important when
first learning this stuff. There's a simple B major backing track which
you can download below so you can get a feel for this yourself.
So let's listen to how each tone of the major scale sounds over its
related major chord. I'll start on the D string root note for a higher
register.
1
Also known as the root note, which defines the tonal center
of our
scale and the root of the major triad - click to hear
2
Often
used as an added note in major chords - click to hear
3
Also known as the major 3rd, and part of the major triad.
This is the
tone that makes it a major scale - click to hear
4
Now, here is our first passing tone. You can tell because it
doesn't
sound as relaxed against the backing chord as the other tones - click
to hear
There's an air of unresolved tension about it. We can mark this up and
come back to it later. It's worth noting that the 4th is rarely added
to the major triad, but there are exceptions such as using the octave
of the 4th (known as the 11th) which tends to sit better against the
major triad.
6
Often
used as an added note in major chords - click to hear
7
Also
known as the major 7th, again, often used to extend the basic major
triad - click to hear
...and then we're back to the root (1)
again.
So it turns out, only one tone, the 4th,
stood out as being unharmonious with our major chord. Now, there are
two questions that arise from this simple discovery...
WHY
is the 4th dissonant and not the other tones?
HOW
can we use this tone, if at all?
Unfortunately, I don't have time to go into the why at the moment,
although it's a fascinating subject (in my opinion) and certainly
explored in great depth in the field of musicology.
But as far as playing this scale goes, how can we use the 4th if it has
this dissonant quality?
We use it as a passing
tone.
See, the best way to think of a passing tone is a tone you shouldn't
hold onto or emphasise in your solos.
Listen again to how the 4th sounds if we emphasise it within a soloing
phrase over the major chord of the same key...
But, since the 4th is essentially part of the major scale, we can, if
we like, glance over it as part of a larger phrase between the more
stable, harmonious tones we heard.
This is known as resolution.
The passing tone provides an unresolved
tension that is resolved to one of the more stable tones in the scale.
The most stable tones in the major scale are the root, 3rd and 5th -
and it's no surprise when you understand the root, 3rd and 5th make up
the
major triad! It's the foundation of the major chord.
I call these safe
tones or resting
tones.
So, going back to that resolution phrase, I've resolved the 4th, a
passing tone, to the 3rd, a tone we can rest on harmoniously.
You could also resolve to other tones outside the major triad - the
2nd, 6th and 7th, with the 7th being the least resolved out of those 3,
but these are specific flavours of this particular major scale, so you
need to know for definite that these tones are compatible with the
major chord being played in the background, especially if there are
chord changes. We'll look more at that some other time. We need to walk
before we can run!
Passing tones in the natural minor scale
Let's look at another scale which makes use of passing tones. Remember,
scales can have more than one passing tone, but the scale we're about
to look at only has one, like the major scale.
This is known as the natural
minor scale...
Its intervals are:
1W2Hb3W4W5Hb6Wb7W1
From the name of this scale we can tell it's a minor scale, so it'll
work over minor chords, but if it was called something less obvious,
we'd know it's a minor scale because of the flat 3rd, also known as the
minor
3rd.
Let's go through the same process we did in the first example, but this
time because it's a minor scale I'll be playing it over a minor chord.
In this case it's D
minor (click here for a D minor drone
track similar to the B major one before so you can explore this scale).
The great thing about this knowledge is that it will come naturally as
you learn more and more scales and investigate how they work over
certain chords.
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