Generated a song where the verse is fire but the chorus is trash? Replace music in the bad part. Keep everything else exactly the same. Done in 60 seconds.
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Select a song and replace a section
Finally: Fix Songs Without Starting Over
Other AI music tools make you regenerate the entire song when one part sucks. That means losing your perfect verse just to fix a weak chorus. Musci lets you replace music in any 10-30 second section while keeping the rest untouched. Select the problem area, hit generate, get two new options. Pick the one that works or try again. Your best parts stay safe.
Click and drag on the waveform to select any 10-30 seconds. Replace music in verse, chorus, bridge, intro, or outro. You decide what needs work.
When you replace music, unselected sections remain exactly as you made them. Perfect verses stay perfect.
Every generation gives you two variations. Compare them against your original. Pick the winner.
The AI analyzes surrounding audio to create natural transitions. No awkward cuts or mismatched energy.
New sections match your song's tempo, key, and vibe. Sounds like it belongs.
Each replacement generates in under a minute. Fast enough to try multiple approaches.

Common Use Case
Your hook needs work
You generated a banger verse. Then the chorus lands flat. Before Musci, your only option was regenerating the whole song and hoping the verse came out just as good. Now you replace music in just the chorus. The verse stays exactly the same. Try until the hook actually hooks.
Fix Lyrics
AI wrote something weird
The melody is great but the AI generated nonsense lyrics or mispronounced something. Edit the lyrics in our text panel, then replace music for that section. Same tune, your words, sung correctly.


Fix Pacing
A section kills the momentum
That bridge goes on forever. The outro puts people to sleep. Replace music in slow sections with something energetic. Shorten what needs shortening. Build where it should build. You control the flow.
Experiment
What if you went a different direction
What if the bridge was acoustic instead of electric? What if the chorus had more bass? Replace music in any section to experiment. Your original version stays saved. If the experiment works, keep it. If not, try again.

Four Steps
Go to My Creations. Find the song you want to edit. Click the edit button.
Drag on the waveform to highlight 10-30 seconds. The lyrics panel shows what you selected.
Click the replace button. Two new versions appear in about 60 seconds.
Listen to both options in context with the rest of your song. Keep the one that fits.
Why This Matters
AI music editing that actually makes sense
When you replace music, your perfect verse stays untouched. Only the selected section gets regenerated.
Replace music in one section costs less than regenerating an entire song.
Replace music surgically instead of rolling the dice on full regenerations.
New sections are fully mixed and mastered. They match the original's production.
Pop, hip-hop, rock, electronic, country, jazz. Works with everything.
Everything you create is yours to monetize. No restrictions.
Questions People Ask
You select a 10-30 second portion of your song. Replace music in that section while keeping everything else identical. Takes about 60 seconds.
Yes. When you replace music, the AI analyzes your entire track first. It matches tempo, key, style, and energy so it blends naturally.
Yes. The text editor lets you modify lyrics in the selected section. When you replace music, the new generation sings your updated words.
10 seconds minimum, 30 seconds maximum. This gives the AI enough context to replace music coherently.
As many as you want. Each replacement uses credits, but there's no limit on attempts.
One bad section shouldn't mean losing your best work. Replace music that needs fixing. Keep what works.