Genres
AI rap song maker for boom bap, trap, and melodic rap
SoundUser is an AI rap song maker for turning a prompt or your own lyrics into a finished hip hop track. Choose boom bap, trap, lo-fi, or melodic rap cues, then guide the vocal with tags. A track costs 10 credits and runs up to 180 seconds.

Boom bap examples and prompts
Every track below was made with SoundUser. The prompt under each player is the exact text we used.
Concrete Sunrise
Promptboom bap, 92 BPM, A minor, gritty, determined, chopped soul sample, punchy kick and snare, upright bass, vinyl texture, 90s East Coast production, rapped male vocal
808 Lullaby
Prompttrap, 140 BPM, F minor, dark, hypnotic, 808 bass, rolling hi-hats, bell melody, half-time feel, sub-heavy mix, autotuned male vocal
Corner Store Philosopher
Promptboom bap, 88 BPM, E minor, reflective, smoky, jazzy piano loop, dusty drums, scratches, rapped male vocal, raw mix
Pressure Cooker
Prompttrap, 150 BPM, C# minor, aggressive, urgent, distorted 808, hi-hat rolls, dark piano, gang vocal ad-libs, rapped female vocal
Choose the rap lane before you write bars
Pick one of 3 lanes first: boom bap, trap, or lo-fi hip hop with rap on top. Boom bap works best when you want a tight pocket, hard snare, chopped sample, and clear syllables around 86-96 BPM. Trap wants 130-160 BPM, but it often feels half-time, so the vocal sits like a slower groove over fast hats.
Melodic rap needs a different instruction. Ask for rapped verse, melodic hook if you want the verse spoken in rhythm and only the hook sung. If you want more sung R&B phrasing, start from AI R&B song generation instead. For darker 808 drums and clipped vocal energy, compare the page for trap song prompts before you write the lyric.
How to make a rap song with AI in 3 steps
Use these 3 steps to keep the beat, vocal, and structure pointed at the same track.
- Paste lyrics or write a short brief with topic, mood, voice, and subgenre. Add section tags like
[Hook],[Rap Verse], and[Ad-Libs]. - Choose the style prompt. Use BPM, key, drums, bass, main instrument, and mix texture. Example:
boom bap, 92 BPM, A minor, chopped soul sample, punchy kick and snare, upright bass, vinyl texture, rapped male vocal. - Generate the track, then edit the prompt if the vocal misses. If it sings too much, add
rapped delivery, minimal melody in verse. If the rhythm rushes, shorten long lines and split packed bars.
If you already have verses, start with the lyrics to song workflow and use the style box for hip hop direction.
Boom bap, trap, and lo-fi hip hop details
Boom bap sits at 86-96 BPM, trap sits at 130-160 BPM, and lo-fi hip hop sits at 70-90 BPM. For boom bap, try A minor, E minor, or C minor with chopped soul sample, punchy kick and snare, upright bass, scratches, gritty sampling, and vinyl texture. Tags: boom bap, 90s East Coast production, mid-tempo, hard-hitting, rapped male vocal.
Trap usually lands in F minor, C# minor, or G minor. Use 808 bass, rolling hi-hats, dark piano, bell melody, autotuned ad-libs, and sub-heavy mix. Tags: half-time feel, modern trap production, dark, aggressive.
Lo-fi hip hop uses dusty drum break, Rhodes piano, muted trumpet, vinyl crackle, tape hiss, sidechain pump, low-passed samples, and swung hats. For instrumental study beats, see lo-fi hip hop generation. Common mistake: asking for all 3 lanes in one prompt. Pick one.
Write rap lyrics that fit the beat
A 16-bar verse works best when each bar has 8-12 syllables and the thought breaks every 4 bars. Long lines can work on paper and still fail in the vocal because the AI has to compress the phrase. If a line has 18 syllables, split it into 2 bars or remove filler words.
Use tags to control delivery:
[Hook]for the repeated main section[Rap Verse]for rhythmic speech[Rap]for a shorter rap section[Ad-Libs]for background shouts or callouts
Avoid rhyming a word with itself unless it is a deliberate chant. Also avoid writing every line with the same end rhyme. A better 4-bar block uses a main rhyme, one slant rhyme, and one internal rhyme. For more prompt control, read the AI music prompt guide.
Worked example: rapped vocal, not sung verse
This worked example uses 92 BPM and section tags to keep the verse rapped and the hook simple.
`[Hook] Concrete sunrise, shoes on the wire Still got smoke in my coat, still walking through fire
[Rap Verse] Bus stop cold, but the notebook warm Kick drum talks when the streetlights turn Pocket full of receipts, rent due soon I count every step to the same old tune
Style: boom bap, 92 BPM, A minor, gritty chopped soul sample, punchy kick and snare, upright bass, scratches, vinyl texture, rapped male vocal, raw mix, minimal sung melody`
It is meant to produce a mid-tempo boom bap track with a clear rapped verse and a hook that can carry a little melody. If it comes back too smooth, add dry lead vocal, less singing, tighter snare. If it sounds too crowded, remove one instrument and keep the sample, drums, and bass.
Prompt mistakes that make rap tracks fall apart
Most bad AI rap tracks fail for 4 fixable reasons: packed bars, mixed subgenres, banned artist-style requests, or vague vocals. Do not write in the style of plus a rapper name. Describe the sound instead: raspy low voice, laid-back pocket, double-time triplet flow, deadpan delivery, or melodic hook with rapped verses.
Do not ask for trap boom bap lo-fi drill in one line. If you want sliding 808s and colder drums, use drill track direction. If you want cowbell distortion and darker Memphis-style energy, use phonk song generation. Keep your main beat request tight: BPM, key, drum type, bass type, vocal type, and one texture. That gives the AI fewer chances to choose the wrong center.
Frequently asked questions
Can the AI rap my own verses?
Yes. Paste your lyrics and mark the sections with tags like [Hook], [Rap Verse], and [Ad-Libs]. Keep verse lines short enough to say in time. If the delivery sounds rushed, cut syllables before changing the beat. If the verse turns melodic, add rapped delivery, minimal sung melody in verse to the style prompt.
How many bars fit in one track?
A practical layout is an intro, hook, 16-bar verse, hook, second verse or bridge, hook, and outro. The exact fit depends on BPM and how dense the lyrics are within up to 180 seconds. Boom bap at 90 BPM gives more room per bar than fast trap hats at 150 BPM with double-time flows.
How do I get a rap vocal and not a singing vocal?
Use direct vocal tags. Write rapped vocal, [Rap Verse], spoken rhythmic delivery, or minimal melody in verse. If you still want a catchy hook, separate it with [Hook] and write melodic hook, rapped verses. Do not use only mood words like emotional or smooth, because those often push the vocal toward singing.
What BPM is boom bap vs trap?
Boom bap usually works at 86-96 BPM with punchy kick and snare, chopped samples, upright bass, scratches, and vinyl texture. Trap usually works at 130-160 BPM, often with a half-time feel, 808 bass, rolling hi-hats, dark piano, bell melody, and autotuned ad-libs.
Can I name a rapper as a reference?
Do not name a real rapper as a reference. Write the vocal and production traits instead. Use phrases like low gritty voice, laid-back behind-the-beat flow, double-time triplet flow, raw boom bap drums, or sub-heavy trap mix. This gives the generator useful musical instructions without asking for an imitation.
What does one rap track cost and can I use it?
A track costs 10 credits and runs up to 180 seconds. Tracks you create are yours to use in your own projects, including commercial ones, under the SoundUser Terms Keep your own project notes with the prompt, lyrics, and date you generated the track, especially if you plan to release it or send it to a collaborator.
One idea · one finished track
Ready to make your track?
Describe the idea, pick a style, and SoundUser writes, sings and mixes the song.
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