How to add vocals to a beat with AI

What you need

• An instrumental you own or have licensed (MP3, WAV or M4A, up to 8 minutes and 20 MB)
• Lyrics, or a clear idea of the topic
• 10 credits per attempt

Step 1: Export a clean instrumental

Bounce the beat without any vocal samples or tags. Trim long silent intros. A steady tempo gives the tightest result; avoid tempo changes for your first try.

Step 2: Match line length to tempo

At 140 BPM (trap, felt at 70), each bar is short, so write punchy lines of 5–8 syllables: "Late nights, cold lights / Built it from the ground up". At 90 BPM R&B there is room for longer, melodic phrases with space for runs.

Step 3: Tag the structure

Mark [Verse] and [Hook]. Keep the hook to 3–6 words repeated, e.g. "from nothing, from nothing".

Step 4: Describe the voice

For the trap beat we used: "confident male rap, short punchy lines, ad-libs on the hook". For the R&B beat: "silky female vocal, close-mic, harmonies on the chorus". Describe qualities, not real artists.

Step 5: Generate and listen for timing

Play the result against the beat. Listen for words landing late at the ends of lines; that means the line is too long for the bar.

Step 6: Fix and refine

• Late or crammed words: cut syllables.
• Weak hook: shorter and more repetitive.
• Wrong delivery: change "sung" to "rapped" or adjust the energy word.
• Need the vocal alone for mixing: run the result through the stem splitter.

Step 7: Mix and release

Split the stems, then rebalance the vocal against your own beat in your DAW if you want more control. Make sure your beat licence allows releases with vocals.

Common mistakes

• Uploading a beat that still contains vocal samples or producer tags.
• Writing the same line length for every tempo.
• Leaving out section tags, so the hook lands in the wrong place.
• Expecting perfect timing on beats with tempo changes; start with a steady tempo.

Example: same beat, two voices

On the 90 BPM R&B beat we generated twice: once with "silky female vocal, close-mic", once with "smooth male falsetto with harmonies". The lyrics and beat were identical; the two versions felt like different songs. Trying two voices is the fastest way to find the right direction.