Keep the start. Remake everything after the cut.
Use Extend when the start is worth keeping and everything after one point can be remade. If the ending is already good and only one middle section is wrong, use Replace Section.
Extend keeps the opening and remakes everything after the cut.
Open a completed track on Create, choose Extend, and drag the KEEP right edge. Audio before that point stays. Audio after it is regenerated. The white playback line is only for preview — it does not set the cut.
KEEP — the part that stays
The green prefix is the audio RaoMusic will leave alone.
RECREATE — everything after the cut
The striped suffix is regenerated from the cut point.
What the Extend waveform means
This is the same KEEP / RECREATE block you get after choosing Extend.
Extend a song in six moves
These steps follow the real Create page, including the button label Generate.
- 1
Open a completed song on Create
The track must be finished. Pending or failed songs cannot be extended.
- 2
Open ⋯ and choose Extend
Extend has no Pro badge. It sits in the same edit menu as Replace, Cover, and Mashup.
- 3
Drag the KEEP right edge to set the cut
The default cut is about two-thirds of the way through. Moves snap in 0.5-second steps. Do not park the cut on the exact start or end — the system keeps it slightly inside the audio.
- 4
Optionally add lyrics for the new ending
If your song already has timed lyrics, the box fills with lines after the cut and updates when you move it. Leave it blank to let the model continue on its own.
- 5
Click Generate
The submit button says Generate, not Extend. Generate starts a new task. It uses the same credits as generating a new song on the selected model.
- 6
Listen from before the cut
RaoMusic returns two candidate songs and the original stays in your list. Start playback a few seconds before the cut and check four things — tempo, key, vocal tone, and whether the lyrics land on the beat. Keep the candidate that crosses the seam cleanly.
How to choose a good cut point
The cut decides how much good material survives. Cut where the music is stable — follow the phrase, not the clock.
Cut here
- At the end of a full phrase — after a line lands and before the next one starts.
- Just before a clean downbeat, so the new audio starts on solid ground.
- Right where the problem starts. Rebuild a few extra seconds instead of rescuing a broken tail.
- On a breath or a short silence between vocal lines.
Not here
- In the middle of a word or a held note.
- During a drum fill or a chord change.
- At the very end of the audio — there is nothing left to rebuild.
- Inside a repeated loop you like. The loop may not survive the rebuild.
What to type for the new part
Extend needs a job for the new part, not a second song. Everything before the cut is already fixed audio.
Do
- Give the new part one clear job with a section tag — [Final Chorus], [Verse 3], [Instrumental Outro].
- Write only the lines that come after the cut.
- Reuse the style and voice wording from the original run so the parts match.
- Leave the box empty to let the model continue on its own.
Avoid
- Rewriting the style or voice for the whole song — the new part will stop matching the kept part.
- Pasting the full lyrics from the top — the model may restart the song structure.
- Stacking several changes in one run. Change one thing per generation.
Easy to get wrong
The white playback line seeks preview audio. It does not change the cut. Only the KEEP right edge sets where the new audio starts.
Select all is the control that jumps the cut almost to the end. Use it when you want nearly the whole song kept.
Uploaded tracks can be extended too. You still pick a cut point the same way.
Extend itself is not a Pro feature. If a specific model requires a subscription, that model gate can still block the run.
If you only want a new ending, stay on Extend. A middle rewrite that should keep the ending is Replace Section.
An abrupt seam usually means the cut sliced through a phrase. Move the cut back to the last stable boundary and generate again.
If the new part sounds like a different song, the instructions changed too much at once. Drop the global style edits and keep only the section tag.
If the vocal drifts, move the cut back into an earlier sung section and keep voice wording minimal.
Extend vs the other Create-page edits
If you only want a new ending, stay on Extend. A middle rewrite is Replace.
| If you want to… | Extend | Use instead |
|---|---|---|
| Keep the opening, change the rest | This is the job | Replace would keep the ending too |
| Fix one middle span | Would also throw away the ending | Replace Section |
| Keep the melody, change style or voice | Wrong tool | Create-page Cover |
| Blend two tracks | Wrong tool | Mashup |
| The take itself is broken | Editing saves nothing worth keeping | Generate again instead |
Keep the opening, change the rest
- Extend:This is the job
- Use instead:Replace would keep the ending too
Fix one middle span
- Extend:Would also throw away the ending
- Use instead:Replace Section
Keep the melody, change style or voice
- Extend:Wrong tool
- Use instead:Create-page Cover
Blend two tracks
- Extend:Wrong tool
- Use instead:Mashup
The take itself is broken
- Extend:Editing saves nothing worth keeping
- Use instead:Generate again instead
Extend FAQ
No. The white line is the playback cursor. Drag the KEEP right edge to choose where the new audio starts.
About two-thirds of the way through the song, not at the end. Move it if you want more or less of the original kept.
No. Lyrics are optional. An empty box lets the model continue. If timed lyrics exist, RaoMusic can prefill the lines after the cut.
Yes. Uploads and generated songs both work. The waveform and cut point behave the same.
Generate uses the same credits as generating a new song on the selected model. The price follows the model, not a fixed extend fee.
Extend is not Pro-gated. A subscription prompt means the selected model requires one, not that Extend itself is locked.
No. Generate starts a new task. The original completed song stays in your list, so you can compare and keep the better version.
At a phrase boundary — after a line lands, or just before a clean downbeat. When in doubt, cut from the earliest point where the problem starts: rebuilding a few good seconds costs less than rescuing a bad ending.
The run changed too much at once — usually global style edits or a full lyric reset. Give the new part one section tag, keep the original style wording, and change only that.
The cut, not the prompt. A cut through the middle of a word, a fill, or a chord change leaves the rebuild nothing stable to stand on. Move the cut back to the last phrase boundary and generate again — the original is still in your list to compare.
Related guides
Keep the opening. Remake the rest.
Open a completed song on Create, choose Extend, and drag the KEEP edge to the last second you want to keep.