The tools side by side
| Tool | What you upload | What you get back | What we could confirm | Source |
|---|---|---|---|---|
| Suno, Add Vocals | An instrumental you upload, one you generated with the Instrumental toggle, or one made from stems. You add lyrics | A new vocal layered on the instrumental. An Audio Strength slider sets how closely it follows the instrumental | A beta feature for Pro and Premier users only. Suno’s own tip: describe both the instrumental and the vocal you want in the style box | Suno help centre |
| Vocuno | A beat without lead vocals, 6 to 60 seconds, as MP3, WAV, M4A, FLAC, AAC or OGG, plus your lyrics | A vocal performance over your track, in more than one variation | It analyses the key and tempo of the instrumental. One free preview without signing in; downloads and the commercial licence need a paid plan | Vocuno |
| Lyro Music | A beat, with or without lyrics | With lyrics: a sung performance at your beat’s tempo and key, separated and returned as an isolated vocal, so the beat is not altered. Without lyrics: an improvised topline from ACE-Step 1.5. Both open in the mixer | Part of the Creator plan. The improvised vocal costs one credit per started minute, minimum 2. Downloads are never counted | Lyro Music, add vocals to a beat |
| ACE-Step 1.5 | Audio you pass to the model yourself | Depends on the task you run; its editing tasks work on existing audio | Open source, so there is no plan or price, but you need a GPU or a hosting service and some technical setup | ACE-Step 1.5 |
Other sites advertise the same job. We list only tools whose own pages we could read and quote; a missing tool is not a judgement of it.
Which one to pick
- You want to try it free first: Vocuno’s free preview, then decide. Remember the 60-second limit per clip.
- You already pay for Suno Pro or Premier: Add Vocals is already in your account. Suno limits downloads to 20 a month on Pro and 60 on Premier (details).
- You want to keep mixing: Lyro Music returns the voice on its own track next to your untouched beat, with EQ, compression, reverb and mastering in the same place.
- You are a developer or want full control: ACE-Step 1.5, run on your own hardware or a host.
How to prepare your beat so the vocal fits
- Export the beat without any lead vocal. A guide vocal left in the file confuses every tool above.
- Leave headroom: a beat that is already limited to full loudness leaves no room for a voice.
- Know the tempo and key. Lyro Music and Vocuno detect them, and you can check them yourself with the free BPM and key finder.
- Write lyrics with even line lengths. Lines of similar syllable counts are easier for a model to place on the beat; the lyrics studio counts syllables per line.
- Describe the voice in a few words: “breathy female vocal”, “raspy male rap”. See prompts for a female vocal and for a male vocal.
What these tools still get wrong
An AI vocal over an existing beat can drift off the beat in the second half, rush lines that have too many syllables, or pick a melody that clashes with a chord the model misheard. Short, even lines and a clearly stated key reduce all three. Expect to generate more than once and keep the best take.
Rights also differ: Suno grants commercial use on paid plans for songs made while you subscribe, Vocuno on paid plans, and Lyro Music on every plan. Your beat stays yours in all of them. Read who owns AI-generated music before you release.
How this page was checked
On 22 Sep 2026 we read each company’s own page linked in the table and copied only what it states. We did not run a listening comparison between these tools, so this page says nothing about which one sounds best.
Questions
Can AI add vocals to my instrumental?
Yes. Suno (Add Vocals, Pro and Premier), Vocuno and Lyro Music (Creator plan) all take an uploaded instrumental and add a sung vocal from your lyrics. ACE-Step 1.5 can do it if you run the open-source model yourself.
Is there a free AI tool to add vocals to a beat?
Vocuno offers one free preview without an account. Downloading the result and using it commercially need a paid plan. Suno’s Add Vocals is for paying Pro and Premier users, and Lyro Music has no free plan.
Will the tool change my beat?
Lyro Music separates the new voice and returns it on its own track next to your original beat, so the beat is not altered. With other tools, check whether you get a mixed file only or separate stems.
How long can my beat be?
Vocuno takes clips of 6 to 60 seconds. Suno’s Add Vocals page does not state a limit, and its uploads can run up to 30 minutes on paid plans. Lyro Music makes tracks of 30 seconds to 3 minutes.
Can I choose the singer’s voice?
You describe it rather than pick a real person: gender, tone (breathy, raspy, soulful) and delivery (rap, belting, whisper). No tool here clones a named singer.
Can I add vocals in Turkish or another language?
You can write lyrics in other languages. Lyro Music sends sung lyrics, Turkish included, to Google’s Lyria 3 Pro, which sang Turkish most clearly in our small blind test.