Write grooves over songs
A chord chart is not a bass part. This page is a method for turning harmony + feel into a line the drummer can trust — and you can remember.
What you need before you invent notes
- Chord chart — at least roots and bar lengths ( | G | Em | C | D | ).
- Tempo & meter — BPM and 4/4 vs 6/8 etc.
- Drum feel — where the kick/snare live (or a click with accents).
- Song job — verse vs chorus vs bridge (busy vs sparse).
No drummer? Use a metronome with a louder click on 1 (and 3 for rock). Sing the kick pattern out loud.
The writing ladder (always climb in order)
Do not skip steps. Each step adds one variable.
- Roots on downbeats — one note per chord, on beat 1 (and maybe 3).
- Root motion — make changes obvious: leap or step into the next root on purpose.
- Rhythm cell — assign a repeating groove cell (8ths, gallop, ghosts) that fits the kick.
- Chord tones — add 5ths / 3rds / 7ths on weak beats only if the groove still locks.
- Approaches — chromatic or scale steps into roots at bar lines.
- Fills — at most one short fill per 4–8 bars; return to the cell.
Worked example — same chart, three jobs
Chart (one bar each): G · Em · C · D in 4/4 @ ~90 BPM. Invented line — not a song quote.
A · Verse (sparse)
G|---------------- D|---------------- A|---------2------ E|-3-----0-------- G Em C(wait) …then D on next bar’s 1
Idea: roots on 1; leave air for vocals. On C you might wait until beat 3 or hold over.
B · Chorus (driving 8ths)
G|---------------- D|---------------- A|-----2-2-----5-5 E|-3-3-----0-0---- G G Em Em C…
Idea: paired 8ths locked to kick/snare backbeat. Mute between notes so it punches.
C · Breakdown (gallop cell on roots)
G|--------------------- D|--------------------- A|--------------------- E|-3-33-0-00-3-33-5-55- G Em C D
Idea: same roots, metal drive cell from Gallop. Still one pitch center per bar.
Map the form
Write a one-line form map before notes:
Intro 4 | Verse 8 | Pre 4 | Chorus 8 | Verse 8 | Chorus 8 | Bridge 8 | Chorus 8 | Outro 4
- Intro/outro — often simpler or more hooky; can preview the chorus root motion.
- Verse — leave space; support lyrics.
- Chorus — clearer pulse; maybe higher energy (8ths, octaves), not necessarily more notes.
- Bridge — permission to change cell or register once, then reset.
Rule: change one thing when the section changes (rhythm cell or register or density) — not all three.
Write to the kick (not the guitar)
Guitar may strum on every 8th. You do not have to match that density.
- Tap the kick pattern on your thigh.
- Put bass attacks on those taps first.
- Only then add notes between kicks (ghosts or chord tones).
If guitar plays a syncopated riff, decide: lock with the riff (metal unison power) or lock with the kick and let guitar float. Both are valid — pick one per section.
Choosing notes over a chord
For a chord lasting one bar, safe palette:
- Beat 1 — root (almost always).
- Beat 3 — root again, or fifth, or octave.
- & of 4 — approach into next bar’s root (half step below/above is classic).
- Weak 8ths — ghosts (
x) keep the right hand moving without new harmony.
Over G: notes G, B, D, F♯ (if Gmaj7 colour), and approaches F♯ / A♭ into G or A into Am, etc. Theory detail: chord tones · apply shapes on Scales.
Groove templates (steal the rhythm, invent the pitches)
Count aloud; swap in the song’s roots.
1 · Four on the floor roots
1 2 3 4 — root each beat. Punk / dance floor. Mute hard between.
2 · 1 and 3
Root on 1 and 3 only. Half the notes, twice the weight.
3 · 8ths with ghosts
1 & 2 & 3 & 4 & R x R x R x R x
R = root, x = ghost. Funk/rock engine. See Muting.
4 · Anticipation
Hit the next chord’s root on the & of 4, then land again on 1. Creates push without rushing the bar.
5 · Pedal tone
Hold one low note (often tonic or dominant) while chords move above — metal / cinematic. Mute carefully so it does not turn to mush.
6 · Gallop cell on roots
From Gallop: one cell per beat, pitch = section root.
Finish checklist (before you call it done)
- Can you sing the line while tapping the kick?
- Do bar-line roots land clearly for a listener who cannot see the chart?
- Is there intentional silence every few bars?
- Does the chorus groove differ from the verse by exactly one design choice?
- Would removing half the notes still work? If yes, try the thinner version.
Practice: write three parts this week
- Pick a progression you know (or I–V–vi–IV in G: G–D–Em–C).
- Write verse sparse + chorus driving (templates 2 and 3).
- Record both; keep the one that locks harder, not the one with more notes.
- Optional: add a bridge pedal tone for 4 bars, then slam back to chorus cell.
Hear the ladder on shared charts: Play along. Walking harmony lines: Walking bass. Metal drive: Gallop.
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Text twin: write-grooves.md