Species Counterpoint: Species Iv

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music theory for musicians and normal people by toby w. rush
Species Counterpoint: Species IV
with the fourth species, we stop using smaller note values and back up a bit to
species I. But instead of having the notes move at the same time, species IV involves
the voices being offset from one another.
C
Ó
˙ ˙
˙ ˙
&
˙ ˙
˙ ˙
˙ ˙
˙ ˙
˙
The biggest difference
with species IV is the
w
fact that dissonances
w
w
w
w
w
w
5
3
6
7
6
7
6
3
6
7
6
4
3
?
are permitted on the
C
downbeat. but as you
might expect, they have
to follow certain
specific rules.
dissonances in species IV must be in the form of suspensions.
oh you
A suspension is a dissonant note that is approached by being
don’t say .
held over — suspended — from the previous note.
C
&
˙ ˙
˙ ˙
in this case, the suspension
another important defining
is the F on the downbeat of
characteristic is that the
the second measure. it’s
suspension resolves down
w
?
w
prepared by the F in the
6
8
7
6
by step. if it doesn’t resolve
C
previous measure, and resolves
7-6
down by step, it’s not a
down to the E.
suspension!
suspensions are great, by the way,
but don’t use the same one more
we label suspensions by the intervals of the
than three times in a row, or
suspension and resolution, so this one
fux will release the hounds.
would be called a 7-6 suspension.
C
&
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the only suspension fux allows when writing
˙ ˙
counterpoint below the cantus firmus is the
2-3 suspension, in which the suspended note
similarly, in
w
forms a second with the cantus firmus, then
this example,
?
w
8 6
4 3
C
resolves down to a third. (when this suspension
the suspended
is written an octave lower, it is sometimes called
note is the D,
C
&
a 9-10 suspension.)
which forms a
w
w
fourth with
see how we resolve to
4-3
2-3
the A. it moves to a C, a third above the
a larger interval, unlike
bass, making it a 4-3 suspension.
˙ ˙
˙ ˙
the 7-6 or 4-3? we’re
?
5
3
2 3
below the cantus firmus,
C
the 7-6 and 4-3 suspensions
so we move away from it.
are the only ones fux allows
because suspensions
when writing counterpoint
always resolve down!
above the cantus firmus.
in species IV, you’re dealing with a lot of limitations with melody and counterpoint, so
you will sometimes get trapped in a situation where nothing will work. when this happens,
you are allowed to “break species”: forget the tie and slip into species II for a couple
C
Ó ˙
&
˙ ˙
˙ ˙
˙
˙ ˙
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of notes.
˙ ˙
for example, here we
w
break species so we
w
w
w
w
w
8
4
3
w
can avoid writing a
?
4
3
4
3
6
5
6
8
6
C
fux-enraging four
4-3 suspensions
in a row!
don’t go crazy with this, though... species IV counterpoint should embrace suspensions,
not avoid them. it’s best to break species only rarely . unfortunately, sometimes that means
backing way up and choosing a different starting pitch for your counterpoint!
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