Fix One Line, Not the Whole Song

For songs you've already generated with LyricToMelody AI: pick the line that needs to change, enter a replacement, and regenerate just that part. Compare it against the original before you decide to keep it.

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Good to know: Fix a Line works on songs generated with LyricToMelody AI in this app — it can't take an uploaded or externally-made track. The regenerated section is built to sound as close to the original singer, melody, and arrangement as possible, but an exact match isn't guaranteed. Nothing is overwritten — the original stays in place and every fix is saved as its own revision you can keep, discard, or try again.

How Fix a Line Works

1. Pick the Song and the Line

Choose a song you generated in this app, then click the exact line you want to change.

2. Enter the Replacement

Type the new line, or use Suggest Alternatives for a few rewritten options if you're not sure what to change it to.

3. Choose How Close to the Original

Pick Close, Balanced, or More Flexible to control how much creative freedom the regeneration takes.

4. Compare and Keep

Listen to the fixed section against the original around that line, then keep it, try another version, or discard it — the original is never touched.

FAQ

Can I fix just one line in an AI-generated song without changing the rest?

Yes, for songs generated with LyricToMelody AI in this app. Pick the line, enter a replacement, and only that section is regenerated — the rest of the song is preserved from your original take.

Will the rest of the song stay exactly the same if I only change one line?

The parts outside the line you're fixing are kept from your original recording, not regenerated. The fixed section itself is built to match the original singer, melody, and arrangement as closely as possible, but an exact match isn't guaranteed — that's why every fix comes with a before/after comparison before you keep it.

Does fixing one line cost less than generating a whole new song?

Fixing a line costs credits, separate from a full regeneration. Check the cost shown before you generate a fix.

What's the best way to isolate what changed between two versions?

Use the before/after preview around the fixed line rather than listening to the whole song again — it's the fastest way to hear exactly what the fix changed.

If I need tighter control over notes and timing, what should I use instead?

MIDI-based workflows such as Text to MIDI and MIDI to Vocals give you more direct control over individual notes than Fix a Line's line-level regeneration does.

Need precise control over individual notes instead? Try MIDI to Vocals.

Don't have a song generated with LyricToMelody AI yet? Generate one first then come back here to fix a line.