AI music is fast. The bottleneck is usually deciding what you want, not the generation itself.
The realistic timeline
Generation itself takes roughly a couple of minutes. Add a few minutes to write or refine the prompt and lyrics, and optionally more if you iterate with variations or edit a section. Most people get a finished track in under ten minutes.
- Generation: ~a couple of minutes.
- Prompt/lyrics: a few minutes.
- Refining: optional.