Get a vocal melody for your instrumental or chords, without singing

Two ways to hear a melody over the same instrumental

Most people searching for a “vocal melody generator” want one thing: to hear a tune over music they already have, because they cannot sing it themselves or cannot find it. Lyro does that in two ways, and the difference is whether you bring words.

The empty-lyrics route is the same path described on the topline generator page, which is written for producers with a finished beat. This page is for songwriters, pianists, guitarists and anyone with chords and no tune. The words route is covered in add vocals to a beat and lyrics written to your beat.

Get your chords into a file Lyro can hear

Lyro listens to audio. It does not read chord symbols, MIDI files or sheet music, so “Am F C G” typed into a box gives it nothing to follow. Play the chords on any instrument or program them in your music software, then bounce the result as a WAV.

• Keep it short. Eight to sixteen bars of the part that needs a tune, such as the chorus loop. A short file costs less and gives the model one clear idea to sing over.
• Start on a bar. The melody comes back lined up with the file you uploaded, so it drops straight in at the bar where that section begins.
• Check the tempo. Tempo and key are read in your browser and are estimates. Half or double the real tempo is the common mistake, and the key can land on the relative key. The BPM and key finder gives you a second reading.
• Keep the chords clear. A piano, guitar or pad playing clean chords gives the model more to follow than a dense mix with the chords buried.
• No chords yet? Describe the style and key to the AI beat maker, take the instrumental it makes and bring it back here.

What it costs: 6 credits a run, words included, whether your file is 8 bars at 120 BPM (16 seconds) or a whole three-minute instrumental. Files over 5 minutes are refused before anything is charged. Starter’s 80 credits cover 13 runs, so three takes of one chorus loop come to 18 credits.

Listen for a phrase, then keep it

You are not looking for a finished vocal. You are looking for one phrase you could sing back. Play each take over the loop at least twice and listen for these:

• A phrase that repeats. A hook is usually one short shape that returns. If a take has one, mark the time it starts.
• Where the phrases start. A melody that begins just before the bar line feels like a pickup; one that lands on the downbeat feels firmer. Either can work, so notice which one you like.
• The range. If it sits too high for you to sing along, pitch the vocal down exactly one octave (12 semitones) in the studio, which keeps it in key with your chords. A shift by any other amount clashes unless you move the instrumental too.
• The rhythm. Often the rhythm of the best phrase is the useful part, even when you change the notes.

Then pick how to keep it. Lyro returns audio, not notes, so keeping a melody means turning it into something you control.

It is audio, not MIDI or sheet music

Producers who search for a melody generator often expect a MIDI clip to drop into a plugin. Lyro does not deliver one, and it does not deliver sheet music or note names. What comes back is a recorded vocal on its own track, which you hear, learn or transcribe. If MIDI is a must, look at a tool built for it: PeakTone shows a “Topline MIDI” lane next to its demo vocal on its own page (read 10 Oct 2026), and we cannot speak for what it delivers beyond that.

The reason to use Lyro anyway is the other half of the job: a real sung sketch, in a voice you chose, over your own music, in a few clicks. For many songwriters hearing the tune is the missing step.

Where the limits are

• It does not hum back your melody. You cannot play or sing a tune and have it sung note for note, in any route. To keep your own voice and tune, record it and build around it with voice memo to song.
• The melody is the model’s, and a new one on every run. Two or three runs give you choices.
• It follows the music it hears, but we do not promise every note fits your chords. If a note clashes, see fix an AI vocal that is out of key, or run again.
• With no lyrics, the words are Lyro’s, written for your music. Read them before you release anything, or replace them with your own.
• You choose a voice type, not a singer. Lyro has no voice cloning, and our acceptable use policy does not allow naming a real artist as a style.
• One lead vocal comes back. No harmonies, doubles or ad-libs are stacked for you.
• Live recordings that drift in tempo are harder to sing on than programmed loops.
• You need the rights to the instrumental you upload. A melody Lyro invents is AI output, so we do not promise it is exclusive or protected by copyright.

Credits, plans and rights

Lyro has no free plan. Bringing your own instrumental is on every plan: Starter is $14 a month for 80 credits. A melody with words Lyro writes costs 6 credits for a file of up to 5 minutes, and a vocal sung to your words costs 7 credits for a file of up to a minute. If a generation fails, every credit for it comes back automatically. The studio, mastering and WAV export come with every plan. See the pricing page.

Every paid plan includes a commercial licence for what Lyro generates, and downloads carry an ID3 tag declaring them AI-generated. Say the vocal is AI-made when a platform, a distributor or a client asks. Words you write yourself are human-authored work; words Lyro writes are not. See music rights.