Generating a promising track does not always mean the project is finished. The song may end too soon, the transition into the chorus may feel weak, or one section may not match the quality of the rest. Extend and Inpaint solve different parts of this problem.
Use Extend when the existing audio works but needs to continue. It can help create a longer outro, add another verse, develop an instrumental section, or continue an unfinished idea. The source track provides the musical context, while your prompt explains how the continuation should develop.
A useful extension prompt should describe both continuity and change. For example:
“Continue the track with the same tempo and instrumentation. Add a short instrumental breakdown, gradually reintroduce the drums, and finish with a calm outro.”
Without direction, the continuation may simply repeat the existing energy. Explain whether the new section should build, relax, introduce vocals, remove percussion, or lead towards an ending.
Use Inpaint when most of the track should remain unchanged but a specific section needs to be replaced. This may be an awkward transition, an unsatisfactory chorus, an unwanted sound, or a part of the arrangement that feels empty. You select the relevant time range and describe what should appear in its place.
For example:
“Replace this section with a stronger pre-chorus using rising synths and lighter drums. Keep the vocal tone consistent and lead naturally into the existing chorus.”
Choose the replacement area carefully. If the selected interval is too short, the new audio may not have enough space to develop. If it is too wide, you may replace musical material that was already working. Including a small amount of audio around the problem area can help produce a smoother transition.
A practical workflow is to use Inpaint for local corrections and Extend for structural growth. You might first replace a weak bridge, then extend the finished version with a longer final section.
Neither tool requires you to regenerate the entire composition. This makes them useful for refining strong ideas while preserving the parts of a track that already work.
