Grooves & pocket

Pocket lab

Four placements of the same two pitches: open E (E1) and its fifth, B, on the A string at fret 2. Nothing about the notes changes between feels — only where they land and how much silence is left over. Set the tempo here and the practice bar at the bottom follows it, so you can turn its click on and hear the cell against the beat.

Feel BPM Play the cell Stop

The count sits above the TAB. Play each feel for eight bars before you switch — the difference is in what you stop hearing.

Practice with a drum loop or metronome accent on beats 1 and 3. Place roots exactly on those kicks, then add offbeat answers. If the kick moves, you move — fills never obscure the downbeat for long.

• Mute and listen to kick alone for 4 bars, then join on identical attacks.
• Record bass + click; zoom the waveform — are attacks stacked?

Silence is part of the groove. Leave rests; mute fully. Dense gallops need clear rests between phrases or the band loses the grid.

Two exercises make the point faster than any amount of playing in the middle:

• Density against space. Two bars of continuous eighths, then two bars of whole-note roots only. Nothing about the notes changes — the contrast is arrangement, and it is the cheapest way to make a chorus sound bigger than a verse.
• Same notes, different accents. Play continuous eighths on open E for eight bars accenting only with the kick, on 1 and 3. Then eight more accenting only with the snare, on 2 and 4. Identical pitches and identical attacks; two different songs.

With a steady click, practice the same whole-note root three ways:

• Center — attack on the click (default learning target).
• Slightly behind — heavier, “fatter” pocket (do not drag into the next beat).
• Slightly ahead — urgent push (do not rush the bar).

Name which one you are practicing. Accidental drifting is not a feel choice. Play eight bars of one, then eight of another, and label the take — do not blend two feels inside one take until you can produce either on demand.

The four feels in the lab are worked examples, not a vocabulary to memorise. The method behind them is short enough to use on any song:

1. Write the grid first, not the notes. Eight eighths for a bar. Decide which of them get an attack before you decide which pitch each attack is.
2. Put beat 1 in. Almost always. If you leave it out, that is an arrangement decision you should be able to defend.
3. Choose your holes on purpose. A cell with no silence has nowhere left to grow when the chorus arrives.
4. Only then pick pitches. Root, fifth, octave will cover most of it; everything else is colour you can add once the rhythm is boring.

Do this once with the click on and you will notice that steps 1 to 3 take longer than step 4. That ratio is correct — it is what makes bass a rhythm instrument. Moving a cell onto real changes is Write grooves over songs.

• Gallop density still needs downbeat agreement with the kick.
• Open-string drones must not smear the kick’s attack — duck the drone with mute between phrases if needed.
• Lead fills: exit early enough that beat 1 of the next groove bar is free.

• Fills that erase beat 1 — always land something on the downbeat.
• Playing the guitar rhythm — bass often simplifies under busy guitars.
• Ignoring the snare — know where 2 and 4 are even when you do not play them.
• Overplaying ghosts — ghosts support; they should not become the hook by accident.

The third feel in the lab moves the fifth to the “and” of 2 and puts nothing on beat 3. That one eighth note is the difference between a part that reports the beat and a part that leans on it. The technical name is anticipation: the note arrives before the beat it belongs to, and beat 3 stays empty because the ear has already been told where it is.

Two things make it work, and both are easy to lose:

• The anticipated note has to be shorter than you think. If it rings through beat 3 and into 4, you have not pushed the groove — you have smeared it. Play it clipped and let the silence do the leaning.
• Beat 3 must stay empty. The moment you add a note there, the push becomes an extra note and the bar goes back to sounding square.

Anticipation across a chord change is the same idea one level up — arriving on the next root on the “and” of 4. That belongs to writing over a chart, not to a one-chord cell.

“Am I in the pocket” is not answerable by feel — you are the least reliable listener in the room while you play. Each of these gives you an answer you cannot argue with.

• Tap 2 and 4 with your foot while you play beats 1 and 3. If the foot drifts or stops, you are counting off your own notes rather than off the bar.
• Drop out for one bar and come back. Play the cell for three bars, rest for the fourth, land on beat 1 of the fifth. Landing early or late means the pulse was living in your hands, not in your head.
• Record ten seconds with the click audible, then solo the bass. Tap along to your own recording. If your tap disagrees with where the click was, the pocket was a wish.

The last one is worth doing once a week and no more — the point is to calibrate your ear, not to audit every take. When you do record, keep two takes rather than one: your best pocket and your best fill. Asking a single take to win both contests is how a good groove gets thrown away for a fill.

Any fill must leave beat 1 of the next groove bar free for a planted root (or intentional rest). Practice fills that end on the “a” of 4, then silence into 1.

Where a note starts gets all the attention. How long it lasts decides whether the groove breathes. The lab's four feels all use the same attack points as some part of each other — what separates them is how much of each beat is left ringing.

Three lengths worth practising deliberately on one pitch, all at the same tempo:

• Let it ring. The note lasts until the next one. Fat, and it works when the guitars are sparse. Under a busy guitar part it turns to mud.
• Half the beat. Attack, then mute. This is the default for most rock and metal pocket, because the gap is where the kick drum's tail gets to be heard.
• Clipped. A short punch and a lot of silence. Funk and staccato half-time verses. Hardest to keep even, because your muting hand is now playing rhythm too — that is the job on Muting & ghosts.

A useful habit: decide the length before you decide the notes. It is the faster way to make a part fit a track, and it costs you nothing to try all three. Filling the gaps with ghosts instead of silence is the same decision one step on, and it belongs to Muting & ghosts, where your muting hand gets the whole page.

Pocket drills (this page) teach placement. Song writing teaches choices over time.

1. Lock a cell on one pitch (open E) until it is boringly even.
2. Move that cell onto a chord chart’s roots — writing ladder.
3. Change density only when the section changes (verse vs chorus).

• Rock — roots on 1 and 3, or straight 8ths; snare answers on 2 and 4.
• Metal drive — gallop or continuous 8ths; mute hard; see Gallop.
• Funk — 16th grid with ghosts; pitched notes on strong syllables; Slap optional.
• Ballad — wholes/halves; vibrato on long tones; never fill every bar.
• Jazz swing — walking quarters; Walking.

Steal the grid, invent the pitches for your chart.

Walking · Write grooves over songs · Bass vs guitar · Bass-only techniques · Muting · Gallop