AI Rap Song Maker — Flow Starts In The Writing
Describe the track and the bars are written first and shown to you — sixteen of them, in the flow you asked for, over trap, drill or boom bap. Then they are performed.
It writes original rap verses from a description and performs them over a beat. The thing worth understanding is that flow is not something added on top of a lyric — it largely is the lyric. How many syllables you pack into a bar, where the stresses fall, whether the rhymes land at the ends of lines or inside them: those decisions are made in the text, which is why a triplet flow and a laid-back pocket produce visibly different writing before anyone performs anything. Here the bars are written and displayed before any audio exists, so you can count them, read them and fix the one that will not sit.
15 free credits on signup — enough for one complete track with cover art. No card required.
Eight Flows And Devices Worth Naming
Other pages sort rap into subgenres, which tells you about the beat and nothing about the rapping. These are the writing and delivery choices that actually change what comes back.
Sixteen-bar verse
The unitThe standard block the form is built from. Eight for a short verse, thirty-two for a long one.
Triplet flow
Three per beatSyllables grouped in threes against a four-four beat. The defining modern trap cadence.
Double-time
Twice the rateTwice as many syllables per bar without changing the beat. Used in bursts, rarely a whole verse.
Laid-back pocket
Behind the beatDelivery dragging slightly late against the drums. Reads as relaxed and unhurried.
Multisyllabic rhyme
MultisRhyming two or three syllables at once rather than one. The density that makes writing sound technical.
Internal rhyme
Mid-barRhymes falling inside the line as well as at the end, so the bar chimes more than once.
Storytelling verse
NarrativeOne continuous story across sixteen bars, usually plainer rhyme so the plot stays legible.
Melodic hook
Sung chorusRapped verses with an actually sung chorus. The most common structure on the charts.
How to Make a Rap Song in 3 Steps
Name the flow, set tempo and feel together, then read the bars.
Name the flow, not just the genre
Triplet, double-time, laid-back pocket, dense multis. Flow is written into the syllables, so it is a text instruction.
Set the tempo and the feel together
140 BPM with a half-time feel for trap or drill, 85 to 95 with light swing for boom bap. Say both.
Read the bars before you generate
The lyric sheet comes first. Count the bars, fix the line that will not sit, then make the audio.
A Flow And A Feel Beat A Genre Name
Trap and drill describe the drums. The syllable rate, the rhyme density and the half-time feel describe the record.
“A hard trap song.”
“Write and sing a trap track at 142 BPM with a half-time feel, booming sustained 808 bass and rapid triplet hi-hat rolls under a sparse dark piano line, sixteen-bar verses in a triplet flow with dense multisyllabic rhyme, a sung melodic hook on the chorus, male vocalist, about turning down a deal that would have paid.”
“An old school rap song.”
“Write and sing a boom bap track at 90 BPM with a light swing, dusty sampled soul loop with a hard acoustic kick and snare and no 808 at all, sixteen-bar verses in a laid-back pocket sitting slightly behind the beat, heavy internal rhyme, male vocalist, about a record shop that closed.”
“A UK drill track.”
“Write and sing a drill track at 142 BPM with a half-time feel, sliding 808 bass gliding between notes, sparse cold string melody and skittering hi-hats, sixteen-bar verses with a conversational off-beat cadence rather than triplets, male vocalist, restrained and matter-of-fact.”
Why The Lyric Sheet Matters Here
Most generators perform first and let you react to what comes out. For rap that is the wrong order, because almost everything you would want to change lives in the writing. A verse that rushes has too many syllables in the bar. A verse that sounds simple has single-syllable end rhyme and nothing internal. A flow that does not feel like trap is missing its triplets. None of that is fixed by regenerating with a different voice, and all of it is visible in the text before you spend anything on audio. Two limits are worth stating plainly. One vocal is produced per generation, so doubled ad-libs, a feature verse in a second voice, and two rappers trading bars are all out. And there are no stems, so a finished track cannot be split into an acapella and a beat, though you can generate an instrumental separately with no vocal at all.
- Organised by flow and rhyme device rather than by subgenre
- The half-time tempo convention explained, which most prompts get wrong
- Trap, drill and boom bap separated by what the 808 actually does
- Bars readable and countable before a credit is spent on audio
- Honest gaps: no ad-lib layering, no features, no stems, no acapella
Rap Prompts Worth Copying
Each names the flow, gives tempo and feel together, and says what the bass is doing.
Trap, triplet flow
“Write and sing a trap track at 142 BPM with a half-time feel, booming sustained 808 bass and rapid triplet hi-hat rolls under a sparse dark piano line, sixteen-bar verses in a triplet flow with dense multisyllabic rhyme, a sung melodic hook on the chorus, male vocalist, about turning down a deal that would have paid”
Boom bap
“Write and sing a boom bap track at 90 BPM with a light swing, dusty sampled soul loop with a hard acoustic kick and snare and no 808 at all, sixteen-bar verses in a laid-back pocket sitting slightly behind the beat, heavy internal rhyme, male vocalist, about a record shop that closed”
Drill
“Write and sing a drill track at 142 BPM with a half-time feel, sliding 808 bass gliding between notes, sparse cold string melody and skittering hi-hats, sixteen-bar verses with a conversational off-beat cadence rather than triplets, male vocalist, restrained and matter-of-fact”
Storytelling verse
“Write and sing a rap track at 88 BPM, warm jazzy sampled loop with brushed drums and upright bass, one continuous story told across three sixteen-bar verses with plain end rhyme so the plot stays clear, no hook until the final chorus, female vocalist, about a night shift that went wrong”
Double-time burst
“Write and sing a rap track at 150 BPM with a half-time feel, heavy 808 and sparse minor synth stabs, sixteen-bar verses that start in a normal cadence and switch to double-time for the last four bars of each verse, male vocalist, aggressive and precise”
Instrumental beat
“Instrumental trap beat at 140 BPM with a half-time feel, deep sustained 808 glides, triplet hi-hat rolls with occasional stutters, sparse detuned bell melody in a minor key, dark and spacious, no vocals at all”
Who Makes Rap Here
Writers & lyricists
A sixteen to argue with, readable before you hear it.
Reels & shorts creators
Original hooks with no copyright claim attached.
Beatmakers
Instrumental beats to write over, with no vocal in the way.
Video editors
Original tracks that clear without a sample to license.
What You Get
A performed track
Stereo MP3, male or female vocalist, near three minutes.
The written bars
Tagged by section, countable and editable before performance.
Download on paid plans
Full commercial rights, no attribution, no expiry.
Free share link
Stream it and send it before spending a download.
Frequently Asked Questions
Starting with flow and tempo, because those two are where most rap prompts go wrong.
Can I control the flow, or only the topic?
More than you would expect, because flow is a property of the writing before it is a property of the delivery. How many syllables sit in a bar, where the stresses land, whether rhymes fall at the end of the line or inside it — all of that is decided in the text, and the text is written and shown to you before anything is performed. So asking for a triplet flow, or for dense multisyllabic rhyme, or for a laid-back pocket, changes the words you get, and you can read them and rewrite a clumsy bar before spending a credit on audio. What you cannot do is direct the performance independently of the words.
What tempo should I ask for — trap sounds slow but people say 140?
Both are true, and this is the single most common way these prompts go wrong. Trap is typically written around 130 to 150 BPM but felt at half that, roughly 65 to 75, because the snare lands on beat three rather than on two and four. That half-time feel is what makes it sound unhurried while the hi-hats skitter. Drill works the same way, usually 138 to 145 with a half-time feel and gliding 808s. Boom bap is different and genuinely slower, sitting around 85 to 95 with a light swing. Ask for 140 with a half-time feel rather than asking for 70, or you will get something that plods.
Can it do ad-libs behind the main vocal?
Not as a separate layer, and for trap in particular that is a real gap worth knowing about. Ad-libs are a doubled second vocal sitting behind the lead, and one generation produces one vocal, so there is no second pass to place them in. You can write ad-lib words into the lyric so they are performed as part of the line, which gets you some of the effect, but not the layered call-and-response of a proper trap vocal. The same limit rules out a feature verse in a different voice or two rappers trading bars inside a single track.
How long is a verse, and can I set the bar count?
Sixteen bars is the standard verse and it is worth naming explicitly, since it is the unit the whole form is built on — eight for a shorter verse, thirty-two for a long one. Ask for a sixteen-bar verse and you will generally get a verse of about that shape. Be aware that this is a request in the text rather than a hard constraint, and there is no duration control on the audio at all, so the finished track lands near three minutes regardless. If exact bar counts matter for a project, read the lyric sheet and count before generating.
What is the difference between trap, drill and boom bap in a prompt?
Tempo, drums and bass, and naming all three settles it. Boom bap: 85 to 95 BPM with a light swing, a sampled dusty loop, hard acoustic-sounding kick and snare, no 808 slides. Trap: 130 to 150 felt half-time, booming sustained 808 bass, rapid hi-hat rolls and triplet subdivisions, dark sparse synth melody. Drill: 138 to 145 felt half-time, the defining detail being the sliding or gliding 808 that bends between notes, plus a colder more menacing melodic line. Say the tempo, the feel and what the 808 does and you will land in the right one.
Can it write in a specific rapper style?
You can type anything, but the page will not push you toward it. Naming a living artist as a style target is awkward if you plan to release the track, and it is also less effective than it sounds — describing the flow, the rhyme density, the tempo feel and the drum palette gets you far closer to a specific sound than a name does. That is why every example here is built from technique rather than from an artist, and it is why the taxonomy on this page lists flows rather than people.
Can I get the instrumental on its own, or the acapella?
You can get an instrumental, but not by splitting a finished song. There are no stems here, so a generated track cannot be separated into vocal and beat afterwards. What works is to generate the instrumental as its own request — the instrumental path skips lyrics entirely and gives you the beat with no vocal — and to generate the song as a separate one. A true acapella is not available at all. Tools that split stems do exist and if that is central to your workflow this is not the right one.
Is it free, and can I release the track?
15 credits on signup with no card, enough for one complete song, with free streaming and a public share link. Downloading and commercial use need a paid plan from $15 a month for 250 credits, and that licence is full commercial with no attribution and no expiry, with no third-party rights holder in the recording — which matters more in this genre than most, since nothing here is sampled from an existing record. Credits refund automatically if a generation fails. Output is stereo MP3, near three minutes, no stems and no WAV.
More Beat & Song Tools
Same studio, same credits — bars, beats or hooks.
Count The Bars First.
Name the flow, give the tempo and the feel, then read the sixteen before you hear them. 15 credits, no card.