How to make a trap beat with AI: 808s, hats and space.

A trap beat is built from a small set of parts: a sliding 808 bass that carries both the low end and the melody of the bassline, hi-hats that switch between straight eighths, triplets and fast rolls, a sparse kick and snare (or clap) pattern, and a dark melodic layer, usually bells, plucks, a piano or a detuned synth. Everything else is space. The engine knows all of this; the prompt only has to point at the version of it you want.

Describe four things: tempo feel, the 808, the hats, the melody. Then stop.

Trap lives in a half-time feel. A beat that feels like 70 BPM is usually written at 140, with the snare on beat three instead of two and four. If you type "70 bpm" you may get a slow, sparse track with no roll energy; if you type "140 bpm" you may get double-time drums that never breathe. The fix is to describe the feel, not the number:

• half-time trap feel, slow and heavy, hats in double time
• 140 bpm trap with a half-time snare, fast hat rolls
• bouncy trap, 150 bpm, snare on the three, hats swinging

"Half-time" is the word that unlocks the genre. Add it and the drums fall into place on almost every run.

Every trap prompt should say what the 808 does. Three adjectives cover most of the genre: sliding (glides between notes), distorted (saturated, aggressive) and long (sustained notes that fill the bar). For hats, name the pattern: rolls, triplets, straight, or sparse. For the melody, name the instrument and the mood.

• dark trap instrumental, sliding distorted 808s, fast hi-hat rolls, eerie bell melody in a minor key, half-time feel
• melodic trap instrumental, long clean 808s, sparse hats, sad piano loop, half-time, spacious
• hard trap instrumental, punchy 808s, triplet hats, aggressive brass stabs, 145 bpm, half-time snare
• lo-fi trap instrumental, soft round 808, lazy hats, dusty keys, slow and hazy

Notice that every prompt contains the word instrumental. Without it the engine will write and sing a hook, which is a different product. Keep it if you want to rap over the beat yourself.

A beat that sounds full on its own is a beat with no room for a vocal. If you plan to rap over it, ask for space in the prompt and in the arrangement: "sparse", "minimal melody", "room for vocals", "drops out for four bars in the middle". The engine treats those as arrangement notes and gives you sections that breathe.

Two more habits that help: ask for an intro of four bars so you have a count-in, and ask for the same loop with variations rather than a busy song structure. A trap beat is a loop with events; a pop song is a structure. The words you use tell the engine which one you want.

Once the instrumental is in your library, you have three ways to turn it into a song.

1. Generate the song directly. Paste your bars in the lyric box, keep the same style line minus the word "instrumental", and let Octa perform them. The rap song guide covers bar length and flow.
2. Use your own voice. Record a voice clone in the app (MY VOICE) and generate the song with it. The engine handles pitch and timing; you get a rap in your timbre over the beat you designed.
3. Record over the exported beat. Download the instrumental, load it in any recording app, and record. On Standard and Premium plans you can also split the beat into stems and pull the melody down under your verse.

Whichever route you take, keep the beat and the vocal in the same key: if you generated the beat in a minor key with bells, write the style line for the song the same way.

A trap beat made from your own prompt is yours under the app terms, including for songs you release and monetize. What to avoid is the same as in every genre: do not name real artists or producers, do not describe a specific existing beat, and do not paste someone else's bars. The content filter blocks named artists anyway; the rest is on you.

When the beat is right, share it to the community feed or post it as a reel: producers on Octa regularly get vocalists asking to use their instrumentals. Your first song is free, no card, and every failed run refunds its credit.