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R&B chords that glide: voice leading and a late snare

Why the same three chords sound stiff in block shapes and smooth on a record: shared notes, half-step moves, and drums that sit a few milliseconds back.

Updated · 7 min read Lesson 3 of 6 in Genre Guides

In short

  1. Seventh and ninth chords share more notes with their neighbours, so the changes sound soft rather than abrupt.
  2. Voice each change so the third and seventh move a half step or stay put. In a ii-V-I that is one or two small moves per chord.
  3. Keep the verse sparse, swing the sixteenths lightly and nudge the snare 15 to 20 ms late, so the beat leaves the middle of the mix to the singer.
In this lesson (8)

The same three chords, two different songs

You loop Dm7, G7 and Cmaj7 on a piano patch, each chord a four-note block in root position. It sounds like an exercise from a theory book: every change is one block jumping to the next. Then you hear the same progression on an R&B record and the chords seem to melt into each other.

The progression is the same ii-V-I on both. The record differs in its voicing (added ninths and thirteenths, each note moving to the nearest note of the next chord) and in drums that sit slightly behind the grid.

Why it matters

The beat exists to carry a voice

An R&B instrumental is a bed for a singer. Abrupt chord changes pull attention to the keys at the moment the singer wants it, and a stiff, fully kit makes the whole bed feel rigid. The smooth sound people want from the genre comes from three moves you can make in any DAW: richer chords, small steps, and drums that sit a little back.

The science

Why small moves sound smooth

A triad stacks three notes. A seventh chord adds a fourth, a seventh above the root: Cmaj7 is C, E, G and B, Dm7 is D, F, A and C, G7 is G, B, D and F. A ninth chord adds one more, so Cmaj9 adds D and Dm9 adds E. The fifth adds little colour and is often left out, which makes room for the ninth.

Extended chords share more notes with their neighbours. Dm9 and G13, voiced as in the figure, share three of their four upper notes. The two notes that define a seventh chord are its third and seventh, the , and in a ii-V-I they move by a half step or not at all (Levine, 1995). The C of Dm7 falls to B, the third of G7; the F of G7 falls to E, the third of Cmaj7.

Figure 1. A ii-V-I in C, voiced close together over the roots. Grey: the bass, the opening chord and notes held over from the chord before. Accent: notes that moved. From Dm9 to G13 only C falls to B. From G13 to Cmaj9 three notes step down and B stays.

The ear hears it that way because of how it groups notes. Huron (2001) showed that most traditional voice-leading rules follow from a few perceptual principles, one of them pitch proximity: a note followed by a nearby pitch is heard as the same line continuing. When every note of a chord moves a step or stays, the listener hears four lines gliding. When the whole block jumps, the lines break and the change is heard as an event.

The drums follow the same logic in time. A snare a few milliseconds late reads as relaxed, as long as the offset is small and consistent. At 90 a sixteenth lasts 60,000 / 90 / 4 = 166.7 ms, so a snare 20 ms late is about a tenth of a sixteenth off the grid.

Figure 2. One bar at 90 BPM. The hats swing at 58 percent, the snares sit 20 ms late and the second kick 15 ms late. Dashed outlines show where the grid would put them.

Late is not automatically better. In listening tests, fully quantized versions of real grooves were rated about as highly as the played originals, and exaggerated offsets lowered the ratings (Davies et al., 2013; Senn et al., 2016). The lean sets the feel; it does not add groove by itself. Hear how far a snare can move before it sounds wrong.

Listen

Move the snare off the grid

The same beat with the snare pushed early or late by a few milliseconds. Listen for weight and lean, not for an obvious mistake.

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Start with your speakers or headphones low.

Try it

From block chords to gliding ones

Use an electric piano patch at 90 BPM.

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Progressions to try with the same method: Fmaj7, Em7, Dm7, Cmaj7 (the bass walks down); Cmaj7, C♯dim7, Dm7 (the bass climbs a half step at a time); Fmaj7, Fm7, Cmaj7 (A falls to A♭, then to G).

Common mistake

Thick chords that jump

You add the extensions and keep the voicing the same. A Dm9 in root position followed by a G13 in root position has the right notes and still jumps, because every voice leaps a fourth or fifth. The richer chord only sounds smooth when its notes move to nearby notes in the next one.

The second mistake is too much lean. A humanize function on every drum, or snares 40 ms late at 90 BPM, sounds like an unsteady drummer. Keep the first kick as an anchor and move only the hits you choose, by the same amount every time.

The third is forgetting the singer. Electric piano voicings sit in the same midrange as a vocal. Keep the verse to drums, bass and one chord instrument, and let the filter open for the chorus.

Figure 3. The same low-pass filter on the chords in two sections, computed. At 1.5 kHz in the verse it darkens the keys and clears the upper midrange for the voice. Opened to 8 kHz in the chorus, it lets their brightness back in.

Takeaway

Move each note as little as it can

Pick the chords, then voice them so the guide tones move by a half step or stay, and let the bass carry the roots. Place the snare a little late and leave the first kick on the grid. When the changes glide and the drums lean back, the keys stay under the singer. For more on the drum side, see the lessons on the late snare and swing.

3 questions

Check yourself

  1. In the change from Dm7 to G7, what happens to the C, the seventh of Dm7?
  2. What is a C♯dim7 doing between Cmaj7 and Dm7?
  3. At 90 BPM a sixteenth note lasts 166.7 ms. You move the snare 20 ms late. Roughly how far off the grid is it?

Sources

Show all 4
  • Davies, M., Madison, G., Silva, P., & Gouyon, F. (2013). The effect of microtiming deviations on the perception of groove in short rhythms. Music Perception, 30(5), 497-510.
  • Huron, D. (2001). Tone and voice: A derivation of the rules of voice-leading from perceptual principles. Music Perception, 19(1), 1-64.
  • Levine, M. (1995). The Jazz Theory Book. Sher Music.
  • Senn, O., Kilchenmann, L., von Georgi, R., & Bullerjahn, C. (2016). The effect of expert performance microtiming on listeners' experience of groove in swing or funk music. Frontiers in Psychology, 7, 1487.

Next lesson · 4 of 6

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Written by Virzy Guns

Songwriter and producer, founder of Virzy Guns Production. Now building HealingWave.