Which AI beat generator gives you a beat you can actually write over?

The preview sounds great. Thirty seconds of a dusty piano loop, a kick that knocks, hats that skip. You download it, open a notes app and try to write the first verse, and that is where it falls apart. The loop shifts on the seventh bar instead of the eighth, so your lines never land where you expect. A bright lead synth plays right through the range where a voice would sit. You have no idea what the tempo is. And when you finally check the licence, it says the track is for videos and podcasts, not for releasing a song.

None of that shows up in a preview. A beat that sounds good and a beat you can write over are two different things, and most AI beat generators are judged on the first one. This page judges them on the second.

One split before we start, so you land on the right page. If you already have a beat and need words that fit it, read how to get lyrics that ride an AI beat: it maps a finished beat in bars and cuts a lyric to it. This page is the step before that one. You have no beat yet, or the one you have keeps fighting you, and you are choosing the tool that makes it. If you would rather build the beat by hand in a DAW, the four elements of a beat is the place to start.

Five things a beat needs before anyone can write on it

Forget "sounds professional". Every tool in this category can make something that sounds finished for thirty seconds. What separates a writable beat from wallpaper is more boring, and you can check all five before you spend a cent.

1. A tempo you know. Writing to a beat is arithmetic before it is art. In 4/4 one bar lasts 240 ÷ BPM seconds, and every line budget you set comes from that number. A tool that lets you set or read the BPM saves you a step. A tool that only takes a text description leaves you to measure it afterwards.

2. Sections in whole bars. Verses, hooks and breaks that change on bar 9, 17, 25, not on bar 7 or 22. Lyrics are written in phrases of four and eight bars. A beat that changes at odd points forces you to write odd-length lines, and they sound wrong even when nobody can say why.

3. A pocket for the voice. The busiest part of the beat should not live in the same register as the singer, or the rapper's mid-range, during the verses. You want to be able to thin out or mute the melody where the vocal goes.

4. Stems, or at least instrument control. Separate drums, bass and melody let you fix problem three yourself, move a section, or hand the beat to someone who mixes. Without them you take the mix as it came.

5. A licence that covers what you plan to do. This is the one people skip, and it is the one that decides everything. Several popular generators sell background music for content. Their licence lets you put a track under a YouTube video. It does not let you release a song on Spotify. If a release is the plan, check this first and the other four after.

Five tools, judged on those five

Here is how five well-known options line up, checked on each company's own pages at the time of writing. Plans and features in this category change often, so treat the table as a map of where to look, then confirm on the live page before you pay.

Read the last column first. Two of the five rule themselves out for a song release before you hear a note.

Soundraw: the most control over the grid

Soundraw is built around blocks. Its help centre describes removing or adding song blocks, setting an energy level per block, and a Mixer mode that splits each block into Melody, Backing, Bass, Drums and Fill tracks you can adjust or mute one by one. The same Mixer lets you set the length, the BPM and the key (chosen from keys the tool has prepared). Soundraw's own blog adds a limit worth knowing: tempo can be fine-tuned within roughly 10 to 20 BPM of the original, so do not expect to drag a track far from the tempo it was generated at.

For a writer, the Melody row is the point. You can mute the melody for the verse blocks and bring it back for the hook, which is exactly the pocket from requirement three. Stems (drums, bass, melody, FX) come on the higher Artist plans, and the cheaper plans download MP3 only. At the time of writing, the pricing page lists distribution and monetisation on Spotify and Apple Music for its paid plans.

Fits: someone who wants to release songs and wants to shape the beat bar by bar without opening a DAW.

Suno: when you want the voice from the same tool

Suno is the odd one out, because it is a song generator first. Its instrumental page tells you to turn on the instrumental option in Create and describe the style, mood, instruments and tempo; it even suggests asking for a tempo that gives you time to phrase the line. There is no BPM field in that flow, so the tempo is whatever the generation gives you, and you measure it. Our guide on controlling tempo in Suno explains why words work better than a number in the prompt.

The advantage is what comes after. At the time of writing, Suno's pricing page lists stem separation on the paid plans (two separation types on Pro, three on Premier), and Premier lists adding new vocals or instrumentals to existing songs. The free plan is listed with no commercial rights, so a song you plan to release starts on a paid plan.

Fits: someone who will write the lyric and then want a voice on it, all inside one tool. It also fits someone who does not mind measuring a tempo after the fact.

Mubert: real editing, but not for a release

Mubert's pricing page gives Pro and Business plans a Full Track Editor that changes BPM and key and edits stems within sections, and a Quick Remix on every plan that regenerates or removes stems. On paper that is a lot of writing control. Then the same page says tracks cannot be published on music streaming platforms (it names Spotify, Apple Music, Deezer and YouTube Music) and cannot be redistributed as standalone music.

Fits: a beat under a video, a stream, a podcast, a game. Not a song you plan to put out.

Beatoven.ai: background music, honestly labelled

Beatoven describes itself as a generator for background music and creates tracks from a text description. Its homepage says downloads come with a non-exclusive perpetual licence, that Beatoven still owns the tracks, and that direct distribution on platforms like Spotify or Apple Music is not allowed. The homepage does not list a tempo control, so plan on measuring it.

Fits: creators who need a bed under content. Same verdict as Mubert for songwriting: good tool, wrong job.

BandLab SongStarter: a free sketch to write on tonight

SongStarter is the idea generator inside BandLab. Its help centre says you pick a genre or type a few words of lyric (up to 50 characters), then change genre, mood, tempo and key from the settings at the top, regenerate, and open the result in BandLab Studio as a project. The ideas are short: you get a starting pattern, not an arranged song. When BandLab launched it in 2022 the announcement described the ideas as royalty-free to keep; terms change, so read the current ones before a release.

Fits: someone who wants to start writing tonight for free and is willing to drag the idea into a full arrangement in Studio, where you can also record the vocal.

Measure the beat before you write a word

Whichever tool you pick, the first thing to do with the beat is turn it into a map. Timestamps mean nothing to a lyric. Bar numbers mean everything.

The formula: bars = seconds × BPM ÷ 240. Here is a 3:12 beat at 100 BPM, the kind of thing a block editor like Soundraw's makes easy to build on purpose:

Beat: 100 BPM, 4/4, 3:12 = 192 s x 100 / 240 = 80 bars
One bar = 2.4 s

bars  1-8    0:00-0:19   intro, keys and hats       -> no vocal
bars  9-24   0:19-0:58   verse, melody muted        -> 16 bars
bars 25-32   0:58-1:17   hook, melody back in       -> 8 bars
bars 33-48   1:17-1:55   verse, melody muted        -> 16 bars
bars 49-56   1:55-2:14   hook                       -> 8 bars
bars 57-64   2:14-2:34   break, drums drop out      -> 8 bars
bars 65-72   2:34-2:53   hook                       -> 8 bars
bars 73-80   2:53-3:12   outro                      -> 8 bars

check: 8 + 16 + 8 + 16 + 8 + 8 + 8 + 8 = 80

The check line is the whole trick. If your sections do not add up to the total, a boundary is wrong, and every line count built on it is wrong too.

Now the budget. A sung verse line usually takes two bars, about four stressed syllables in the first and a breath in the second, so a 16-bar verse holds about eight lines. A rap verse runs denser, often one line per bar, so the same 16 bars hold sixteen. A hook lives on held notes: four lines in eight bars is plenty. The break at bars 57 to 64 is a gift: eight bars with the drums out is exactly where a short bridge sits.

This is also where tools separate in practice. With Soundraw, Mubert's Track Editor or SongStarter's settings, you know the BPM and can build the map in two minutes. With a text-to-music tool you play the track with a metronome app or a tap-tempo counter first, and you watch for the classic trap of reading it at half or double speed.

Space for the voice is something you build, not something you get

Generators make beats that sound full, because full is what impresses in a preview. Full is the enemy of a vocal. A quick test that costs nothing: play the beat from the start of the verse and speak your first line over it at normal volume. If you find yourself pushing to be heard, or the melody keeps answering every phrase you say, that verse needs space.

How you make it depends on the tool:

• Soundraw: mute the Melody track for the verse blocks in Mixer mode, or lower its energy, and leave it in for the hook.
• Mubert: use Quick Remix to remove or regenerate the stem that crowds the verse.
• Suno: separate stems after generating and drop the melodic stem under the verses in your editor.
• SongStarter: the idea opens in Studio as separate tracks, so you thin it out there.
• Beatoven: you have the least to grab here. Try describing a sparser arrangement in the prompt and generating again.

The contrast you build this way does double work. A verse with the melody out and a hook with it back in is one of the oldest arranging tricks, and it tells the listener the hook has arrived before a single word of it lands.

Rights: decide what you will do with the song first

The licence question deserves its own minute, because getting it wrong costs you the song, not the beat. Here is the plain version of what each company's own pages said at the time of writing:

• Mubert's pricing page rules out publishing tracks on music streaming platforms.
• Beatoven's homepage rules out direct distribution to platforms like Spotify or Apple Music and says the company keeps ownership.
• Soundraw's pricing page lists distribution and monetisation on streaming for its paid plans.
• Suno's pricing page lists commercial use rights on Pro and Premier and none on the free plan.
• BandLab described SongStarter ideas as royalty-free when it launched the tool; check its current terms.

And one thing that sits above every row: a licence to use a beat does not answer every question about a song built on it. If you feed one company's beat into another company's tool to add a voice, both sets of terms apply. This is not legal advice: rules on ownership and licensing differ by country and by each company's terms, and who owns AI-generated music explains why the answer is less settled than it looks. If money or a release depends on it, ask someone qualified where you live.

Where the lyric comes from

A beat generator gives you the music. None of the five writes your words for you in a form you can fit to a map, and that is the gap we fill. Plainly, so nothing is confused: sunomarket is an independent site. It is not Suno, and it is not affiliated with Suno or with any other company on this page.

Our lyrics generator takes a written brief and returns a title and a full lyric with [Verse], [Chorus] and other section tags, ready to paste into Suno's Lyrics field or any tool with a lyrics box (how each tool reads the tags differs). It does not hear your beat and it never makes audio. That is why the map comes first: the map tells you how to fill the form.

For the 80-bar beat above, the brief almost writes itself:

structure  classic       verse, hook, verse, hook, bridge, hook:
                         the bridge goes into the break at bars 57-64
hook       chant         a short line that sits on the same beat every time
vocal      male          whoever will actually perform it
language   en
POV        first
emotion    defiance, confidence
age        18-24, 25-34
theme      Night shift at a loading dock, saving for a car to leave town.
           Concrete objects: the forklift beeping in reverse, a timecard,
           a map with one city circled.

What comes back will usually be longer than your budget. That is normal: cut each verse line to its image and its four stresses, keep the hook short enough to repeat, and keep the section tags as they came. The cutting is covered step by step in the beat-plus-lyrics walkthrough.

The cost, stated once. A lyric on the SM1 model is 20 credits, which is $0.20. SM2 and SM3 are 80 credits, $0.80, and run an extra editing pass in which a detector flags weak lines and a repair step rewrites them. The monthly plan is $5 for 500 credits a month, 25 SM1 lyrics, and unspent plan credits clear at renewal. The lifetime plan is $19 once for 1 500 credits that never expire, 75 SM1 lyrics; it is not unlimited. New accounts start with no credits, so there is no free trial of the generator. The pricing page has the details.

If you want help with the beat itself inside Suno rather than the words, the style catalogue describes nearly 2 000 styles as Suno prompts, and the free part covers full recipes for the ten most popular ones.

When the beat still fights you

Every line lands a beat early or late. You probably measured the tempo at half or double speed. Tap along to the snare: if the count feels frantic, halve it; if it feels like a ballad over a busy beat, double it.

The hook feels like it ends too soon. The hook section is not a multiple of four bars, or your hook line is three bars long inside an eight-bar section. Rebuild the hook to one, two or four bars, or ask the tool for a longer hook block.

The verse sounds crowded even after cutting words. It is the beat, not the lyric. Go back to the pocket test and take the melody out under the verse.

The beat changes on bar 7. Some generations simply do this. In a block editor, move or extend the block. In a text-to-music tool, it is usually faster to generate again than to write around it.

You love the beat but the licence says no release. Do not write the song on it. Use it as a reference for the feel, and rebuild something similar in a tool whose terms cover your plan.

FAQ

Which AI beat generator is best for writing lyrics over? There is no single winner, because the answer depends on the last column of the table. For a release with fine control over the grid, Soundraw's paid plans fit. For a beat plus a voice from one place, Suno on a paid plan. For a free sketch tonight, BandLab SongStarter. For video backgrounds, Mubert or Beatoven.

Can I upload my beat to your lyrics generator? No. It works from a written brief only and returns a title and a lyric. The bar map you make from the beat is what connects them.

Do I need stems to write over a beat? To write, no. To make space for the voice and to fix a section, they help a lot. If a tool offers no stems, look for per-instrument mute or energy controls instead.

Should I put the BPM into the lyric brief? It is better spent elsewhere. The generator cannot hear the beat, so it cannot check a number against it. Spend the theme on objects and images, then cut the draft to your map.

How many beats should I generate before I start writing? Fewer than you think. Pick the first one that passes the five checks and the pocket test. A beat you finish a song on beats twenty you only liked.

Do this now

Open the tool whose licence matches what you will do with the song. Generate one beat, then before you write a word, write its bar map and make the check line add up. Mute or thin the melody under the verses. Then take the map to the lyrics generator, set structure and hook from the sections you counted, run one SM1 generation for 20 credits, and cut the draft to your budget with the beat playing.