The Dominant Seventh

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music theory for musicians and normal people by toby w. rush
The Dominant Seventh
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The dominant seventh is the diatonic seventh
chord built on the fifth scale degree. we
already discussed diatonic seventh chords...
why give this one all this special attention?
but another reason
for one thing, the
for spending a little extra
dominant seventh is,
by far, the most common
time with it is the fact that
seventh chord used by
there are a few things
that apply to it that don’t
the composers of the
apply to the other diatonic
common practice period.
seventh chords.
b
w w
it’s just a major-minor seventh...
first, a note on terminology:
the reason these are often
w w
&
confused is that in popular
and jazz theory, the term
the terms “major-minor seventh”
“dominant” is used to label
and “dominant seventh” are not
the chord type instead of
interchangeable! “Major-minor
b
w w
until it’s placed in a particular key!
& b
the chord’s role.
seventh” is the chord’s type, and
w w
“dominant seventh” is the role
the chord plays in the context
of a particular key .
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the other important thing to know about the dominant seventh chord is that common practice
period composers would sometimes use some non-standard ways of resolving the seventh!
ornamental resolution
transferred resolution
in this resolution, the seventh is still
this is the “hot potato” resolution: instead of
resolved down by step, but it takes an
being resolved down by step in the same voice,
ornamental “detour” before getting there.
#
the seventh is passed to another voice in
œ œ œ œ ˙
œ
˙
#
&
˙
another dominant seventh chord.
œ
œ
œ
œ
œ
the ornament
&
œ
can be any
the seventh still
˙
shape or
˙
œ
seventh
needs to resolve
resolution
transferred
˙
œ
length, but it
œ
?
#
ornament
œ
˙
down by step by
?
#
œ
to tenor
œ
must resolve
whatever voice is
to the note
the last to have it.
down a step
from the
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seventh of the
If the bass voice gets it, he resolves it
seventh chord.
immediately, ending the fun for everyone.
bass resolution
delayed resolution
in this resolution, the seventh of the chord
Here, the resolution of the seventh is
is still resolved down by step, but the note
delayed by moving to some other chord
it resolves to appears in the bass voice.
(usually the subdominant) and having the
#
œ
œ
seventh of the chord hold out until the
œ
&
œ
dominant seventh returns.
#
the voice that
œ
œ
œ
œ
œ
œ
&
œ
œ
had the seventh
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after the V
œ
resolves up,
œ
seventh
returns, the
resolution
usually by step.
?
#
œ
œ
œ
œ
voice that has
œ
seventh
resolution
œ
œ
?
#
the seventh
œ
œ
œ
should still
resolve it
appropriately!
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