Independence

Chapter 29 — Part IV, Interaction: What Happens Between Bass and Harmony? The bass maintains its own contour or rhythm, distinct from the upper voice, without being locked to it.

The Question

If the bass and the right hand aren’t doubling each other, does that automatically mean they’re moving in opposite directions?

The Mental Model

Independence means the bass keeps its own contour or rhythm, distinct from the upper voice, without being locked to it. That’s a weaker, more common condition than it sounds: it only requires that the bass isn’t tracking the upper line. The two voices can still happen to move the same direction at some point — that coincidence doesn’t undo the independence, because nothing about it was locked or deliberate.

This is easy to confuse with Contrary Motion, a stronger and more specific relationship where the two lines deliberately move in opposite directions, consistently, as an intentional contrapuntal device. Independence is the general condition of two unlocked voices; Contrary Motion is one particular, disciplined way of using that freedom. Not every independent bass line is contrary, and calling every non-doubling bass line “contrary motion” is the common error this chapter exists to correct.

Placed against the previous chapter, a pattern emerges: Doubling is maximum coordination, the bass locked to the upper voice’s exact contour and rhythm. Contrary Motion is also tightly coordinated, just aimed at the opposite outcome — a deliberate, disciplined mirror rather than a copy. Independence sits between them as the absence of any such lock at all, which is why it’s the loosest of the three to define and the easiest to mistake for whichever of its neighbors happens to come to mind first.

The Microscope

Both panels share the identical right-hand line: a smooth, ascending quarter-note figure. Only the relationship between the two staves changes.

A — An unlocked contour. The bass has its own syncopated rhythm and its own shape, unrelated to the melody above it.

A smooth ascending Cmaj7 melody over a syncopated, contour-independent bass line.

X:1
T:Independence — an unlocked contour
C:Alessandro Bessi
R:Concept study
M:4/4
L:1/8
Q:1/4=92
%%score { RH LH }
V:RH clef=treble name="Harmony"
V:LH clef=bass name="Bass"
K:C
[V:RH] "Cmaj7"C2 D2 E2 G2 |]
[V:LH] "^independent"z1 C,,1 z1 E,,1 z1 D,,1 z1 G,,1 |]

Listen

Play Full on A: the bass rhythm falls between the beats while the melody sits squarely on them, and the two contours don’t resemble each other at all. Play Full on B: the mirroring is audible immediately — this is a tighter, more composed relationship than A, not just a stricter version of the same thing.

See

In A, the bass rhythm (z C,, z E,, z D,, z G,,) never lands where the melody’s quarter notes land, and its shape — up, down, up — doesn’t track the melody’s steady ascent. In B, the bass shares the melody’s exact rhythm, note for note, moving the opposite direction every time. B is not “more independent” than A; it’s a different, more constrained relationship that happens not to double.

Play

Independence Across Two Chords. Practice holding a syncopated, unrelated bass contour under a smooth right-hand line.

Two bars of offbeat bass rhythm under smooth quarter-note harmony, over Am7 then Dm7.

X:1
T:Independence Across Two Chords
C:Alessandro Bessi
R:Exercise
M:4/4
L:1/8
Q:1/4=92
%%score { RH LH }
V:RH clef=treble name="Harmony"
V:LH clef=bass name="Bass"
K:C
[V:RH] "Am7"A2 C2 E2 C2 | "Dm7"D2 F2 A2 F2 |]
[V:LH] "^independent"z1 E,,1 z1 A,,1 z1 C,,1 z1 A,,1 | "^independent"z1 F,,1 z1 D,,1 z1 A,,1 z1 D,,1 |]

Play both hands together, then isolate the left hand alone and check that its offbeat placement stays exact even without the right hand’s beats to lean on. The independence has to survive without the other voice propping it up.

Vary

Rewrite the second bar of “Independence Across Two Chords” so the bass moves in the exact opposite direction of the melody, beat for beat. Is the result still Independence, or has it become Contrary Motion? What’s the smallest change that would move it back?

The Music

“Loose Thread” is an eight-bar jazz-funk study in G major where the bass keeps one syncopated rhythmic shape under four changing chords while the melody moves independently above it. In two of the eight bars, the bass and melody happen to move the same direction for a beat — that coincidence doesn’t cost the line its independence, because the offbeat placement never once locks onto the melody’s rhythm.

Loose Thread. One consistent syncopated bass rhythm, unlocked from the melody's contour throughout.

An eight-bar jazz-funk study in G major over Gmaj7, Em7, Am7, and D7, with an offbeat bass rhythm that never tracks the smooth right-hand line.

X:1
T:Loose Thread
C:Alessandro Bessi
R:Jazz-funk study
M:4/4
L:1/8
Q:1/4=96
%%score { RH LH }
V:RH clef=treble name="Harmony"
V:LH clef=bass name="Bass"
K:C
[V:RH] "Gmaj7"G2 B2 d2 B2 | "Em7"e2 G2 B2 G2 | "Am7"A2 c2 e2 c2 | "D7"d2 ^f2 A2 ^f2 |
"Gmaj7"B2 d2 G2 d2 | "Em7"G2 B2 e2 B2 | "Am7"c2 e2 A2 e2 | "D7"^f2 A2 d4 |]
[V:LH] "^independent"z1 G,,1 z1 D,1 z1 B,,1 z1 G,,1 | "^independent"z1 E,1 z1 B,,1 z1 G,,1 z1 E,1 |
"^independent"z1 A,,1 z1 E,1 z1 C,1 z1 A,,1 | "^independent"z1 D,1 z1 A,,1 z1 ^F,1 z1 D,1 |
"^independent"z1 B,,1 z1 G,,1 z1 D,1 z1 G,,1 | "^independent"z1 G,,1 z1 E,1 z1 B,,1 z1 E,1 |
"^independent"z1 C,1 z1 A,,1 z1 E,1 z1 A,,1 | "^resolve"D,8 |]

Reflection

Every bar of “Loose Thread” carries the same tag, "^independent", even in the bars where the bass and melody briefly move the same direction. What does that tell you about what Independence actually tracks — the direction of the two lines, or something else?