How to upload audio to Suno and extend a song

Published September 19, 2026. Official documentation checked on the same date.

Start with Audio Upload when the musical idea already exists as a recording. Use Extend when you want a continuation or a different ending. An audio reference gives you a concrete phrase to work from; write down which part of it you want to preserve before generating anything.

Check the upload length

Suno's upload guide lists up to 60 seconds for Basic and eight minutes for Pro and Premier. On Create, use Audio Upload to record or choose a file; the uploaded recording is added to your library. These are upload limits, separate from generated-song duration. Check the upload dialog if your account shows a different allowance. Source: Audio Uploads.

For a first experiment, we suggest a short, clear recording of your own melody or instrumental idea. A longer file is useful only if the additional material helps explain the musical direction.

Choose a reference with a clear purpose

Try labeling your source before uploading:

Source	What to listen for in the result
A hummed chorus idea	Whether the melodic contour remains recognizable.
A guitar phrase	Whether the rhythm and phrasing still feel connected.
A rough full-band demo	Whether the arrangement supports the part you care about.

Those are listening goals, not preservation guarantees. If the recording contains a spoken count-in, background conversation or a long silence, consider making a cleaner excerpt first so your test has less ambiguity.

Extend from a deliberate point

For a library song, open … → Remix/Edit → Extend, choose the continuation point, add the next lyrics or style direction, and generate. Once you find a continuation you want, use … → Create → Get Whole Song on it to join it to the retained original. Source: How do I make my song longer?.

Our suggested first test is a new ending: identify the last phrase you want to keep and note its timestamp. Listen around that boundary before choosing it. Avoid choosing a point simply because it is a round number of seconds.

Here is an original direction to adapt in the style input:

Continue the warm acoustic arrangement into a quiet outro.
Gradually thin the percussion, leave space after the final vocal,
and resolve with a short guitar phrase.

If the continuation needs lyrics, add only the intended next passage in the lyric input. Plan its structure with the section tags guide. This example has not been audio-tested and does not guarantee an exact ending.

Listen across the join

Do not judge only the new tail. Play from before the continuation point and check for a sudden change in vocal character, groove, room sound or loudness. Record the exact boundary and model alongside the result.

If the join is distracting, keep the text fixed and try a nearby musical boundary. If the join works but the new section goes in the wrong direction, keep the boundary fixed and change the continuation brief. That separates two different problems.

Common questions

Should I use Extend to fix one line in the middle?

For an isolated lyric correction, start with Replace Section. Save Extend for testing a continuation or ending so you have fewer moving parts to compare.

Does uploading my voice create a reusable Voice profile?

That is a separate setup flow with verification. Follow the Voices guide if you want to create with your own voice across songs.

Where should I keep the experiment notes?

In MusicPrompt Studio, save the prompt, Suno link and a listening note such as “continued after the second chorus; transition clean, ending too dense.” Uploading and audio editing happen in Suno. MusicPrompt helps keep the decisions readable for the next version.