Add AI Vocals
to Instrumental Tracks
Upload a backing track. We write and sing a vocal over it. MP3, WAV, OGG, M4A, FLAC, AAC. Up to 8 minutes and 200 MB. Your own recordings and demos work. Some commercial tracks may be refused.
20 credits per generation · No subscription required
- 16K output
- 500+ AI models
- No watermark
- Commercial license
- Pay-per-use
Upload a backing track. We write and sing a vocal over it. MP3, WAV, OGG, M4A, FLAC, AAC. Up to 8 minutes and 200 MB. Your own recordings and demos work. Some commercial tracks may be refused.
Hear it in action
Outputs
Generated music 1
Generated music 2
Why Choose Us
Powered by cutting-edge AI technology that delivers unmatched quality and performance
Natural AI Vocal Performances
Get sung toplines with real phrasing, breathing, and emotion — the premium engines are what deliver a human read rather than a flat, robotic one.
Your Instrumental, AI Voice
Upload any beat or instrumental and the AI performs your lyrics over it, locking to the tempo and key of the track rather than singing on top of it out of time.
Premium Engine Quality
Runs on V4.5+ and V5 only, because delivering a convincing vocal over an external instrumental is one of the harder tasks and needs the best models.
Full Vocal Direction
Set the exact lyrics, a concrete style description, vocal gender, and required negative tags to steer the delivery toward the voice you want.
Add Vocals inputs and specs — what you provide, what you get
The five inputs Add Vocals needs, plus the engines and upload limits, in one table.
| Spec | Detail |
|---|---|
| You upload | An instrumental audio file (not a library track) |
| Required inputs | Lyrics or prompt, style description, negative tags, and a title |
| Vocal control | Male or female voice, steered by your style description |
| Accepted formats | MP3, WAV, OGG, M4A, FLAC, AAC — up to 200MB, 8 min |
| Engines | V4.5+ and V5 only, for a natural, in-time topline |
| Credits | 20 credits per generation |
See it in action
Built by the Imagera AI Team
AI researchers, engineers & content specialists
Imagera is a unified AI creation platform for images, video, voice and avatars. Outputs ship at up to 16K resolution with no watermark and a commercial license included — choose from 500+ AI models in a single workspace.
Questions
Frequently Asked Questions
Everything you need to know about AI Add Vocals
Upload an instrumental track, write the lyrics you want sung, and describe the vocal style, and the AI performs those words over your music — matching the timing, rhythm, key, and mood of what you uploaded rather than singing on top of it out of time. Because the model reads your instrumental for its tempo and feel, the vocal is placed to sit inside the arrangement, so a beat you made or an instrumental you generated becomes a full song with a topline. It is the mirror image of Add Instrumental, which builds a band under a vocal you already have.
You supply five things: the uploaded instrumental audio file, the lyrics or prompt for what should be sung, a style description for how the vocal should sound, negative tags describing what to avoid, and a title. Add Vocals requires an audio upload — you are providing the instrumental the singer performs over, not selecting a library track. Because it runs on the newest premium engines, the cleaner and more in-time your instrumental is, the more accurately the AI can lock the vocal to your groove and key.
Add Vocals runs only on the newest engines — V4.5+ and V5 — because performing a convincing vocal over an external instrumental is one of the harder things the models do. Older generations can write songs from scratch well, but they are less reliable at reading an uploaded backing track and delivering a topline that stays in key and in time across the whole arrangement. Restricting this feature to the premium engines is what buys you the natural breathing, phrasing, and emotional delivery, rather than a flat or robotic read that drifts off the beat.
Negative tags tell the AI what to keep out of the performance, and this feature makes them mandatory because a vocal has many ways to go wrong. Practical negative tags include "off-key, robotic, monotone, autotuned, shouty" to steer toward a natural, musical delivery. Since your positive style description sets the target and the negative tags fence off the failure modes, spending a moment on the negatives is one of the highest-leverage things you can do — it is often the difference between a take that feels human and one that feels synthetic.
Yes. Use the vocal gender parameter to request a male (m) or female (f) voice, and the AI adjusts the range and timbre to match — a lower, warmer delivery or a brighter, higher one. Pair the gender choice with your style description for finer control: "female, breathy, intimate" reads very differently from "female, belted, powerful". If the first result sits in an awkward range for your instrumental, switching the gender or adjusting the style description usually moves the vocal into a pocket that suits the track.
Write the lyrics as you would sing them — line breaks matter, because they hint at phrasing, and shorter, singable lines usually deliver better than dense paragraphs. For the style, be concrete about the voice and the emotion: "male, soulful, restrained verses, big open chorus" gives the model a clearer target than "good singing". If a section feels rushed or crammed, trim words from that line; if it feels empty, add a short phrase. Treat the lyrics and style as things you refine between runs rather than getting perfect on the first attempt.
You can upload the instrumental in MP3, WAV, OGG, M4A, FLAC, or AAC. The file can be up to 200MB and up to 8 minutes long. For the cleanest result, upload a clear, well-mixed instrumental that is in time — the AI derives the tempo and key from what it hears, so a loose, distorted, or very quiet backing makes the vocal harder to lock in. If your instrumental already has a scratch vocal or bleed on it, a cleaner instrumental-only version will give the AI a more reliable read.
They solve different problems. Generate Music writes the whole song — instrumental and vocal — from a text prompt, so you do not control the exact backing. Add Vocals keeps your instrumental fixed and only performs a topline over it, which is what you want when you have already made or generated a beat you like and just need it sung. Use this table to pick: AspectAdd VocalsGenerate Music You provideAn instrumental you uploadA text prompt only AI generatesOnly the vocal, over your trackThe whole song, backing and vocal EnginesV4.5+ and V5 onlyAll versions Cost20 credits20 credits
Add Vocals runs asynchronously, so it is not returned instantly — you start the job, it processes in the background, and the finished vocal track appears in your Music Factory library when it is ready, typically within about a minute depending on load. You do not need to keep the tab open; the result is saved so you can come back to preview and download it. That background model also means you can queue a vocal, adjust the lyrics for a second version, and compare the two rather than waiting on a spinner.
The vocalled track becomes a normal Music Factory track you can keep shaping. If one line of the vocal came out wrong, rewrite just that span with Replace Section instead of redoing the whole thing; if the song ends too soon for your edit, continue it with Extend Track; and if you want synced words for a lyric or karaoke video, run it through Timestamped Lyrics. Because everything stays in your library, the key and tempo stay consistent from the instrumental you uploaded through to the finished, sung master.
Yes. Every output from Imagera Music Factory, including an instrumental you have topped with an AI vocal, carries a full commercial license, so you can use the finished song in videos, ads, podcasts, games, or paid client work and publish it on any platform. Credits are consumed at the moment you start the job. Bear in mind the license covers the material generated by the tool — if the instrumental you upload contains someone else's copyrighted recording, adding vocals to it does not grant you rights to that original.
The clearest use is turning a beat or instrumental you already have into a complete song. Producers use it to hear a topline over a track before committing to a session singer; content creators use it to put custom, on-brand lyrics over a music bed; and songwriters use it to test whether a set of lyrics scans and sings well before recording them for real. It is also a fast way to make a demo vocal for pitching, or to add a hook to an instrumental that felt unfinished. Because you supply the words, it is well suited to bespoke content — a jingle with your product name in it, a birthday song, or a themed track — where a generic generated vocal would not say what you need.
The AI locks the vocal to the tempo and key it reads from your instrumental, so timing problems almost always trace back to the upload. A loose, drifting, or heavily processed instrumental gives the model an ambiguous read, and a busy mix with a scratch vocal already on it can confuse where the beat sits. The fixes are practical: upload a cleaner, instrumental-only version that is steady in tempo; make sure the file is not clipped or very quiet; and keep your lyric lines singable rather than crammed, since dense lines force the AI to rush syllables. If one line still feels rushed after that, trimming a couple of words from that line usually settles it.
Add Vocals performs the voice you describe for a single job, so the delivery is driven by your style description and vocal-gender choice each time. If you want a consistent, recognisable voice across multiple tracks, the suite has a dedicated path for that: generate or vocal a track you like, then build a reusable voice persona from it so future generations can carry the same vocal identity. For a one-off song, a detailed style description — the same gender, tone, and character words each time — will already keep the voice broadly consistent, and pairing that with a persona is what makes it repeatable across a whole release.
It depends on how much control you want over the backing. If you already have an instrumental you like — one you produced, or one you generated as an instrumental in Generate Music — Add Vocals is the right tool, because it keeps that exact backing fixed and only performs a topline over it. If you do not care about the specific instrumental and just want a finished song, generating with vocals from a text prompt is faster, since one run produces the backing and the vocal together. A common hybrid workflow is to generate an instrumental first so you can shape the beat exactly how you want it, then bring it here to add the sung part, which gives you tight control over both halves of the song rather than accepting whatever the model pairs them as.
AI Add Vocals
with AI
Upload a backing track. We write and sing a vocal over it. MP3, WAV, OGG, M4A, FLAC, AAC. Up to 8 minutes and 200 MB. Your own recordings and demos work. Some commercial tracks may be refused.
20 credits per generation · No subscription required
AI-generated music is created using Imagera music engines. Results may vary. All outputs include commercial usage rights. Credits are consumed at the time of generation.
What is AI Add Vocals?
A Music Factory workflow that performs an AI-sung vocal over an instrumental you upload, matching its tempo and key. It is the mirror of Add Instrumental, which builds a band under a vocal you upload.
How much does adding vocals cost?
20 credits per generation, with plans starting at $19.99 and credits included. You pay only when you start a job, and credits are consumed at that moment.
What inputs are required?
An uploaded instrumental audio file, the lyrics or prompt, a style description, negative tags (required), and a title. There is no library-track option — you supply the instrumental as an upload.
Which engines are supported and why?
Only V4.5+ and V5. Performing a convincing vocal over an external instrumental needs the premium engines to keep the topline in key and in time and to deliver natural breathing and phrasing.
Can I choose the voice?
Yes. Set the vocal gender (male or female) and pair it with a concrete style description — for example "female, breathy, intimate" versus "male, belted, powerful" — to control range, timbre, and emotion.
What files can I upload?
MP3, WAV, OGG, M4A, FLAC, or AAC, up to 200MB and 8 minutes. A clean, in-time, instrumental-only file gives the AI the clearest read on tempo and key to lock the vocal to.
How fast is it and is it instant?
It runs asynchronously rather than instantly. Start the job, let it process in the background, and the vocalled track appears in your library, usually within about a minute depending on load.
Do I get commercial rights?
Yes — every output carries a full commercial license for videos, ads, podcasts, games, and paid work. The license covers the generated material; it does not grant rights to any copyrighted recording you upload as the instrumental.