Next-section job
State whether the passage must answer, escalate, release, bridge, or close the arrangement.
AI Song Extender for a Controlled Continuation
Choose a precise point in a song you own, describe the musical job of the next section, and create a private continuation beside the source.
Mark an audible seam in the source
Select the source, mark an intentional join point, and define the function of the next section.
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Measure seconds from the source opening, or leave this empty so the model selects a handoff.
Set the continuation time to zero seconds or a positive value.
An uploaded source is retained for seven days. The extension is stored as a separate private song in My Songs rather than written over the source.
Design the transition before generating it.
Treat the timestamp as an arrangement decision: select the source, set the boundary, and specify what the incoming section must accomplish.
- 01
Establish the source by selecting an eligible song from My Songs or uploading a supported file you are authorized to process.
- 02
Place the handoff at a meaningful phrase boundary when timing matters, then describe the role, energy, and instrumentation of the incoming section.
- 03
Audition the completed private result in My Songs. Compare downbeat, ambience tail, lyric syntax, and energy across the join while the untouched source remains beside it as the control.
Define the handoff before directing the next passage.
Continuity depends on the boundary between existing and generated material. Select a musically intelligible handoff before describing what the next section must do.
Unchanged source timelineDirected continuation
The source remains intact through the chosen continuation timestamp.
The generated passage advances the arrangement beyond the selected handoff.
Use the source audio to prove the join point.
Use elapsed seconds from the source's first frame. A boundary after a complete phrase, cadence, or transition gives the continuation clearer musical context than an arbitrary number.
- 01
Play four seconds before and after the proposed timestamp; reject it if the cut interrupts a word, sustained note, fill, or unresolved cadence.
- 02
Write the destination as a section function—bridge that releases tension or final hook with wider drums—rather than a list of moods.
- 03
Keep the timestamp empty to let the model identify a viable transition from the source.
Design the section that should follow the handoff.
The model receives both source context and the timestamp. Use the direction field to define the post-handoff change in energy, lyric motion, instrumentation, or section role.
Continuity check
After generation, compare downbeat placement, lyric syntax, ambience tails, and tonal pressure across the join.
Boundary evidence
Confirm the source reaches a phrase ending, downbeat, or deliberate transition before the new material begins.
Audition the seam beside its untouched source.
Track the job in My Songs, then audit the finished continuation beside the original private source.
Continue the arrangement without replacing the source.
Use an extension when continuity is the goal. Choose another workflow for replacement vocals, a new rendition, or isolated arrangement parts.
Continue a verse without closing its musical thought
Place the handoff at a stable phrase boundary so cadence, harmony, and section logic provide usable context for the response.
Increase the hook's width after the handoff
Describe the required energy delta after the join—more open, denser, restrained, or climactic—rather than requesting generic continuation.
Reserve a final passage for resolution
Add a verse, bridge, hook, or outro as a new artifact when the source works and only the arrangement length is incomplete.
Preserve the source as the comparison baseline
Because the extension remains separate, My Songs supports direct evaluation of the seam without altering the source recording.
Define the handoff before extending a song.
Where should I place an AI song extension seam?
Listen for a completed phrase, a clean downbeat, the end of a hook or verse, or a deliberate transition whose function is obvious. Measure that position from the source opening in seconds. If you leave the timestamp empty, the model chooses the boundary.
How do I prompt the next section without changing everything?
Name the destination section first, then describe its energy movement, instrumentation, lyrical turn, and ending behavior. The direction is required even without a timestamp. A job such as eight-bar bridge into a final hook is more testable than simply asking for more music.
How can I judge whether the generated join is usable?
No seam is guaranteed to be invisible. Compare rhythm at the downbeat, vocal or lyric syntax, reverb tails, tonal balance, and energy on both sides. If one dimension jumps, keep the source fixed and revise either the timestamp or that single continuation constraint.
What happens to the source after I extend a song?
Active paid access is required. AI2Rap keeps the permitted source unchanged and saves the completed private extension as a separate item in My Songs, so the original remains available for another seam test. You remain responsible for authorization to transform the source.