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How do I extend a song with AI?
Use AI Music Extender to choose an existing audio source and generate a continuation. Supply a continuation point or musical direction when needed, then listen to the join and ending. An extension creates new material, so it may change the phrasing, instrumentation or vocal delivery.
By AI Music.Video · Updated:
Before you start
Keep the original track and decide why you need more music: a longer outro, another passage or room for a video ending. The current upload interface accepts MP3 or WAV up to 15 MB and eight minutes for Extend. Uploaded sources receive a public source link, so choose material appropriate for that workflow.
Steps
- Open AI Music Extender. Choose Upload, a public HTTPS audio URL or an available track in My music. Confirm the source by listening before setting continuation details.
- Add a style description when the extension needs a particular direction. Use the Lyrics field for intended new vocal material when appropriate. For an instrumental continuation, choose the relevant instrumental setting rather than pasting words you do not want sung.
- In Advanced settings, use Continue at (seconds) when you need to specify the continuation point. Listen around that point in the source and choose a musical boundary. Check the displayed charge before selecting Extend music.
- Review the result in Your music. Listen through the join and the full ending, then download the chosen output. If you need to combine or trim material, do so in an audio editor before using the track for video generation.
Worked example
Suppose a visual ending needs another instrumental phrase after the final chorus. Choose a point where the vocal has resolved and describe a restrained outro with the existing instruments. Check whether the result preserves the mood and gives the final image enough space. Do not assume it will land on an exact video frame.
Check the result
You should have a continuation you can use in a finished audio edit. Follow how to add music to a video when matching it to existing footage. For karaoke material, prepare the backing with the AI stems guide before extending it.
If something goes wrong
If the join is abrupt, try a more stable musical boundary or simplify the direction. If the source is unavailable, choose a valid uploaded file or an accessible library track. If a request is pending, use the offered retry control before changing inputs. Extension does not recover missing original stems or guarantee a copy of the earlier performance.