How to make drum and bass in your browser

By Tongkit Leong · August 8, 2026 · 8 min read

Drum and bass is built from a fast, chopped breakbeat near 174 BPM, a deep rolling sub bass, and an arrangement that stays deliberately sparse — and you can program all three from scratch in the Tracks browser studio in an afternoon, with no software to install and no account to create.

The anatomy of a drum and bass track

Drum and bass moved fast and stayed weird from the start, but almost every subgenre of it shares the same three load-bearing elements:

• A chopped breakbeat — a drum pattern built from short, rearranged snare and kick hits rather than a straight loop, giving the rhythm a jittery, edited feel even at high speed.
• A rolling sub bass — a low, often sliding or reese-style bassline that fills the space between drum hits and carries most of the track's weight.
• Extreme sparseness — drum and bass tracks often run with just the break and bass playing for long stretches, using restraint rather than density to build tension.
• Half-time and double-time contrast — many tracks drop into a half-time feel for a breakdown, then snap back to full-speed breaks for the drop, using tempo *feel* rather than actual BPM changes to shift energy.
• Wide dynamic range — quiet, spacious intros and breakdowns set up drops that hit harder by contrast.

Tracks has what you need for this built in — the drum machine and piano roll for chopping the break, a subtractive synth for the sub bass, mixer automation for filter and volume drops, and sidechain ducking to keep the low end tight under the break.

Step 1: Set your tempo

Open the Tracks studio and set the BPM in the transport bar. Drum and bass covers a narrower range than most electronic genres, but the exact number still shapes the feel:

• Jump-up and liquid: 160–172 BPM. Slightly more laid-back, more room for the break to breathe.
• Classic and neurofunk: 172–176 BPM. The most common range, and where 174 BPM has become close to a genre default.
• Jungle-leaning and faster styles: 176–180 BPM. More frantic, closer to the genre's early-90s roots.

174 BPM is the safest starting point if you're not sure which corner of the genre you're aiming for — you can always nudge it a few BPM in either direction once the break is programmed.

Step 2: Program the chopped breakbeat

Add a track and open the drum machine. Start with a base pattern that leans on syncopation rather than a plain backbeat: kick on the first step, a second kick tucked in just before the snare instead of squarely on the beat, and the snare landing slightly off from where a straight beat would put it. This uneven placement is what gives a break its rolling, off-kilter feel compared to a house or techno kick pattern.

Once the base pattern feels right, the real character comes from chopping it. Open the piano roll or step grid and start editing: shorten individual hits, repeat a snare twice in quick succession, drop a kick out of one bar entirely, or shift a hat slightly off-grid. Real breakbeats were built by editing sampled drum loops into new shapes, and recreating that editing process — cutting, repeating, and rearranging short hits — is what makes a programmed break sound alive instead of looped. See Quantize and swing explained for how to loosen a pattern off the grid without losing the pocket.

Half-time drops

For a breakdown section, thin the break down to just a kick and snare on a slower-feeling half-time pattern, or drop the drums out almost entirely and let the bass and pads carry the section. The contrast between a sparse breakdown and a full-speed break dropping back in is one of the genre's most reliable tools.

Step 3: Write a rolling sub bass

Add a new instrument track and open the subtractive synth. For a clean, weighty sub, start with a sine or triangle oscillator — the fundamental should sit low and pure, without a lot of harmonic content competing with the break's snare and hats.

Open the piano roll and write a bassline that moves: gliding between notes, sliding down at the end of a phrase, or holding a note and automating the filter cutoff to create movement without changing pitch. A bass part that sits still on one note for too long tends to feel static against a busy break, so aim for a line that breathes and shifts even if the notes themselves are simple.

For a heavier reese-style tone, layer two detuned sawtooth oscillators under the sub and run them through a low-pass filter, then automate the cutoff for movement. See Subtractive and FM sound design for more on building a bass patch from the ground up.

Locking the bass to the kick

With a fast break and a low, sustained bassline, the kick and bass will fight for the same low-frequency space unless you manage it. A light sidechain duck on the bass triggered by the kick, or a short EQ cut on the bass around the kick's dominant frequency, keeps both audible without the low end turning to mud. See How to lock a bassline to the kick for the full setup.

Step 4: Keep the arrangement sparse

The instinct when a track feels empty is to add another layer. In drum and bass, resist it. Some of the genre's most effective drops are just a break and a bass, nothing else, and the space is what makes the low end and the drum edits land as hard as they do. Before adding a new part, ask whether the section actually needs it or whether it just needs the existing parts arranged better.

When you do add extra elements — a pad, a vocal chop, a simple lead stab — keep them thin and use them to mark structure rather than to fill the mix. A single held pad chord under a breakdown, or one recurring stab that only appears at the drop, does more for the arrangement than a full second layer of instrumentation.

Step 5: Build the arrangement in energy stages

Drum and bass arrangements are usually built around drops rather than a verse-chorus structure. A common shape looks like this:

1. Intro (8–16 bars): the break alone, or the break with a filtered, muted version of the bass, building anticipation before the drop.
2. Drop 1 (16–32 bars): the full break and bass locked in together, along with any supporting stabs or pads.
3. Breakdown (8–16 bars): strip back to a half-time feel or near-silence, often with a pad or vocal chop carrying the section.
4. Drop 2 (16–32 bars): the full arrangement returns, sometimes with a variation on the break or an added layer for extra weight.
5. Outro (8–16 bars): thin the arrangement back down, often ending on the break alone.

Block these sections out on the Tracks timeline before refining any single part — see How to arrange a song for more on building a structure from scratch.

Step 6: Mix and export

Before you export, spend a few minutes balancing levels in the Tracks mixer:

1. Balance the break and sub bass first — at this tempo and this low end, if those two don't sit right together nothing else in the mix will fix it.
2. Apply a compressor on the drum bus with a fast attack and a moderate ratio to glue the chopped hits together into one consistent-sounding break.
3. Keep everything below roughly 150 Hz mono — a wide sub bass loses punch and can cause phase issues, especially on club systems.
4. Watch your master gain staging; fast, sparse drops can read as louder than they measure, so trust your meters over your ears when levels get close to clipping.

When the balance feels right at a comfortable volume, export to WAV for a clean master file or MP3 to share online — see How to export your song to MP3 or WAV for the full walkthrough. Your project stays in your browser the entire time; Tracks never uploads it anywhere.

Frequently asked questions

What BPM is drum and bass?

Most drum and bass sits between 160 and 180 BPM. Jump-up and liquid styles lean toward 160–172 BPM, classic and neurofunk sit around 172–176 BPM, and faster jungle-leaning styles push toward 176–180 BPM. 174 BPM is a reliable starting point for most subgenres.

What makes a breakbeat different from a regular drum loop?

A breakbeat is built from short, individually placed and edited hits rather than a straight repeating pattern. Producers chop, repeat, reverse, and rearrange the kicks and snares so the rhythm feels syncopated and edited, which is what gives drum and bass its rolling, off-kilter energy even at high tempo.

Why does my sub bass sound weak on laptop speakers?

Sub-heavy bass built on a sine or triangle wave under roughly 80 Hz often won't reproduce on small speakers at all, so it can sound thin or missing on a laptop even when it's correctly balanced. Check the low end on headphones or a subwoofer, and consider layering in a touch of upper harmonic content so the bass still reads on smaller speakers.

Do I need to use a real chopped drum sample to get this sound?

No. You can build a convincing chopped break entirely with the Tracks drum machine and piano roll by programming individual hits and editing their timing and length — the technique matters more than the source. If you do want to work from a real recorded break, Tracks' stem extraction can also pull drums out of an existing track. See How to split a song into stems.

How long should a drum and bass track be?

Most drum and bass tracks run 4 to 6 minutes, long enough to fit two full drops with a breakdown between them. Shorter, DJ-tool-style tracks built around a single drop can run closer to 2 to 3 minutes.