Eight tracks, sensibly chosen
808, kick, snare, hat, open hat, clap, perc and vox. That is the full instrumentation of most trap records, laid out so you are never scrolling to find the row you need.
Drum machine · Web Audio
Trap Machine Pro
Built around the two things trap actually needs: an 808 with its own track, and hi-hats that can subdivide as far as you want. Eight tracks, up to sixty-four steps, a triplet mode, and six patterns already programmed for when the blank grid is the problem.
8 TRACKS
64 STEPS
6 PATTERNS
TRIPLET MODE
MIDI EXPORT
0 INSTALL
Under the hood
The 808 gets its own lane
The bass track is separated from the kick on purpose. In trap they do different jobs - the kick is transient, the 808 is pitch - and giving each its own row is what stops them fighting.
What you get
Made for one genre, useful for several
The layout is trap-first, but a 64-step grid with triplets and MIDI export is not fussy about what you write on it.
Up to sixty-four steps
Patterns are stored at full length and you choose how much of it plays. Sixteen steps for a simple loop, sixty-four when the hats need somewhere to develop over four bars without you copying a bar four times.
Triplet mode for real rolls
Hi-hat rolls are triplets, not sixteenths, and a grid that cannot subdivide into threes will never sound right. Switching the mode changes the subdivision so the roll lands where the ear expects it.
Six patterns already written
Classic trap, boom bap, house 4/4, minimal techno, UK drill and a dedicated hi-hat roll pattern. Load one, keep the skeleton, replace everything else - that is faster than starting from silence.
Pattern tools that save time
Copy, paste, randomise and clear, all on keyboard shortcuts. Right-click a track to preview its sound without placing a step, and rename tracks so the grid reads the way your project does.
Export the MIDI
When the pattern belongs in a DAW, export it as MIDI and take it with you. Patterns are also saved locally, so closing the tab is not the same as losing the work.
Starting points
Six patterns, one grid
Load one and change the 808 line first - it is what makes a trap beat sound like yours.
CLASSIC TRAP
Sparse kick, snare on three, 808 sliding underneath and hats subdividing. Everything hangs off the 808 line; the drums are mostly punctuation.
HI-HAT ROLLS
A pattern built specifically to demonstrate triplet subdivision. The best way to hear why the triplet mode exists is to switch it off while this is playing.
UK DRILL
Sliding 808s, off-kilter snare placement and a darker, sparser hat pattern. The 64-step length matters here - drill patterns rarely repeat every bar.
BOOM BAP
Straight kick and snare, swung hats, no 808. Proof that the machine is not limited to one genre despite the name.
Getting started
From an empty grid to a trap loop
Load Classic Trap
Start from a working pattern rather than silence. Play it once and decide what you want to keep - usually the snare placement and nothing else.
Write the 808 line
This is the melodic part of a trap beat. Place the notes where the harmony wants them, not where the kick is, and let the two rows do separate jobs.
Build the hats
Start with a steady eighth or sixteenth, then add rolls at the end of phrases. Switch on triplet mode before you write the roll, not after.
Extend and export
Push the pattern out to 32 or 64 steps so the hats can develop, then export as MIDI or leave it saved locally and come back to it.
Specifications
The full sheet
| Type | Trap-oriented drum machine and step sequencer |
|---|---|
| Tracks | 808, kick, snare, hat, open hat, clap, perc, vox |
| Steps | Patterns stored at 64 steps, with shorter playback lengths selectable |
| Subdivision | Standard and triplet modes |
| Presets | Classic trap, boom bap, house 4/4, minimal techno, UK drill, hi-hat rolls |
| Pattern tools | Copy, paste, randomise, clear - with keyboard shortcuts |
| Track tools | Right-click to preview a sound, track renaming |
| Export | MIDI export of the current pattern |
| Saving | Patterns persisted locally between sessions |
| Requirements | Any modern browser with Web Audio - Chrome, Edge, Firefox, Safari. |
A drum machine that understands the 808
Most drum machines treat the 808 as another kick sample. In trap it is not - it is the bass line, and it needs its own row so it can be written melodically while the kick handles the transient. Trap Machine Pro starts from that assumption, which is why the first track on the grid is the 808 rather than the kick.
Rolls need triplets
The hi-hat roll is the defining gesture of the genre, and it is built on triplets. A sixteenth-note grid can approximate one but it will always land slightly wrong. Toggling triplet mode changes the subdivision properly, and the difference is audible within one bar.
Sixty-four steps because four bars is the phrase
Trap and drill patterns rarely repeat every bar - the hats develop, the 808 answers itself, the snare moves. Storing the pattern at sixty-four steps means you write the phrase once instead of copying a bar and editing the copy.
Part of the GOONS studio
Patterns export as MIDI for any DAW, and the machine shares the transport and audio graph with the samplers, synths and effects in the rest of the catalog. One subscription covers everything, and a 7-day free trial covers the deciding.
Questions
Frequently asked
How long can a pattern be?
Patterns are stored at sixty-four steps and you choose how many of them play. Short loops stay short; when the hats or the 808 need four bars to develop, you extend the playback length instead of copying a bar and editing it.
Can it do proper hi-hat rolls?
Yes - that is what the triplet mode is for. Rolls are built on triplet subdivisions, and switching the mode changes the grid accordingly so the roll lands where it should rather than approximately where it should.
Which patterns are included?
Six: classic trap, boom bap, house 4/4, minimal techno, UK drill, and a pattern dedicated to hi-hat rolls. Despite the name, the machine handles anything you can write on an eight-track grid.
Can I export to my DAW?
Yes. Patterns export as MIDI files, which import into any DAW with your own sounds attached. Patterns are also saved locally, so closing the tab does not lose the work.
Why is the 808 a separate track from the kick?
Because they do different jobs. The kick provides the transient and the 808 provides the pitch and the sustain. Writing them on one row forces them onto the same rhythm, which is precisely what makes amateur trap beats sound muddy.
Is Trap Machine Pro free?
It is part of the GOONS Studio subscription (€9.90/month), which unlocks every app in the catalog, the 5000-sample library and cloud projects. New accounts get a 7-day free trial with full access and no card required.
Keep exploring
Other apps in the studio
Ready when you are
Write an 808 line and roll the hats
Trap Machine Pro comes with the GOONS Studio subscription at €9.90/month, alongside every other app in the catalog. Start with the 7-day free trial - no credit card, cancel whenever.
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