Simple replace

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What the server does

• Range snaps to a 40ms grid.
• A span shorter than 4 seconds is widened around its center. The result is still capped at 120 seconds.
• A song shorter than 4 seconds is HTTP 400.
• Context is about ±15 seconds around the span. Do not send infill_context_range — it is ignored and not allowed.
• Omit title and tags to keep the original song’s title and style.
• infill_type is deprecated. smart, classic, and fixed all become infill.

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Lyrics, in order

1. continued_aligned_prompt — you already wrote the full lyrics with the new lines in place.
2. Otherwise the original lyrics, swapping original_infill_lyrics for infill_lyrics (a one-line change).
3. Otherwise the original lyrics unchanged (music-only; the words stay).
4. Otherwise HTTP 400 — the clip has no lyrics and you did not send continued_aligned_prompt.

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Parameters

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Examples

{
  "task": "replace_simple",
  "model": "chirp-v6",
  "clip_id": "3e7e9538-c474-45a7-8181-3da327bd654b",
  "range": { "start_s": 30, "end_s": 45 }
}

{
  "task": "replace_simple",
  "model": "chirp-v6",
  "clip_id": "3e7e9538-c474-45a7-8181-3da327bd654b",
  "range": { "start_s": 30, "end_s": 45 },
  "original_infill_lyrics": "old line here",
  "infill_lyrics": "new line here"
}

{
  "task": "replace_simple",
  "model": "chirp-v6",
  "clip_id": "3e7e9538-c474-45a7-8181-3da327bd654b",
  "range": { "start_s": 30, "end_s": 45 },
  "continued_aligned_prompt": "[Verse]\nSunshine on my face today\n[Chorus]\nBrand new chorus line"
}