Extend Music with AI Continuation

Pick a track you already generated in Music Factory and choose a point to continue from. The run carries that track's own audio ID rather than a written description, so the new section is written out of the recording itself instead of starting over — a verse can roll into a new bridge, or the track can simply run longer from the point you set.

Extend Track works on a song that already lives in your library, so you select the source track — which supplies its underlying audio ID — rather than uploading anything. From there you set the continue-from point and, if you want, override the direction. If instead you want to continue a file from your own computer, that is a different workflow: Upload & Extend accepts any audio file, while Extend Track is specifically for tracks Music Factory generated for you.

Yes. The continue-from control lets you set the exact timestamp where the AI picks up. Continue from the very end to make the song longer, or set the point earlier in the track to grow a new section out of the middle. Choosing a clean boundary — the end of a chorus, the top of a verse, a clear bar line — gives the model the tidiest place to hand off, so the continuation feels like the next part of the song rather than a patch dropped in.

Clear the direction, style and title — the studio opens with all three filled in — and the run carries on from the source as it was, which is what to do when you want more of the same song. If you want it to evolve, you can write a direction for the new section and override the style and title so it moves somewhere fresh while still growing out of what came before. This is what lets you take a two-minute idea and turn it into a full arrangement with a distinct bridge or outro rather than a straight loop.

All three grow or reshape a song, but they take different inputs and do different jobs. Use this to choose: Extend Track — Input: A generated Music Factory track · What it does: Continues it from a chosen point. Upload & Extend — Input: Any audio file you upload · What it does: Continues your own recording. Replace Section — Input: A generated track + a time range · What it does: Rewrites one span in place.

As many times as you like. Each extension costs 20 credits and produces two variant continuations, and you can take the version you prefer and extend it again, building the song up in stages. Chaining extensions this way is how you grow a short sketch into a full-length composition — write a verse, extend into a chorus, extend that into a bridge — with every stage carrying the musical context of the parts you already committed to.

Extend Track supports the full range of Music Factory engines rather than a single fixed model, so you can match the engine to the song you are continuing. Staying on the same engine generation the original track was made with usually gives the most consistent match, since newer and older engines have slightly different vocal and arrangement characters. If you are unsure, continuing on the engine you already used is the safest starting point for a seamless join.

Extend Track runs asynchronously, so it is not returned instantly — you start the job and it processes in the background, with the two continuations appearing in your library when they are ready. You do not need to keep the tab open the whole time; the results are saved so you can come back to compare the variants and pick the one you want to keep building on.

Yes. Like every Music Factory output, a track you have grown with Extend Track carries a full commercial license, so you can use the finished song in videos, ads, podcasts, games, or paid client work. Credits are consumed when you start each extension, and because the two variants can differ, it is worth listening to both end to end before you commit to one and continue the chain.

Every extension returns two continuations that interpret your source slightly differently, so the right choice is a listening decision rather than a settings one. Play each variant from a little before the join point through to the end, and judge two things: whether the transition sounds smooth, and whether the direction the new section takes is the one you want for the song. Keep the variant that flows best and feels right, then use that exact track as the source if you extend again, so each stage builds on the take you actually chose rather than the one you discarded.

The usual cause is a continue-from point that lands mid-phrase or mid-note, which gives the AI an awkward place to take over. Move the point to a cleaner boundary — the end of a chorus, the start of a verse, a clear bar line — and run it again. If the new section drifts stylistically, either clear the style field so it stays close to the original, or, if you did override it, tighten your style tags so they describe the source more closely. Because each attempt is its own 20-credit generation producing two variants, a couple of focused retries usually lands a clean join.

The frequent ones are lengthening a track that ended too soon for a video or podcast cut, growing a strong two-minute idea into a full arrangement with a proper bridge and outro, and turning a single generated loop into a longer bed of background music. Because the continuation grows out of the existing song, it is also useful when you like a track overall but want it to build further before it ends. Once a track is the right length, you can still reshape a single part of it later with Replace Section without disturbing the extension you just made.