LTX Video 2.3 Audio-to-Video - Ekly API

Generate video driven by an audio clip (2-20s) with LTX-2.3 — lip-sync and motion follow the sound. Optionally condition on a starting image.


Model id	`ltx-2.3-audio-fal`
Media	video
Submit to	`POST /v1/videos`
Price	80 credits per_generation before discounts
Typical time	about 60.0 s

Request

Required: prompt, audio
Optional: aspect_ratio, first_frame

{
  "model": "ltx-2.3-audio-fal",
  "prompt": "A slow aerial shot over a misty pine forest at dawn",
  "aspect_ratio": "auto",
  "audio": "asset_…"
}

Field	Allowed	Default
`aspect_ratio`	`auto`, `16:9`, `9:16`	`"auto"`
`audio`	asset id (up to 1)
`first_frame`	asset id (up to 1)

Reference inputs take asset ids from POST /v1/uploads or an earlier output’s asset_id. Prices and allowed values come from the live catalog; GET /v1/models/ltx-2.3-audio-fal is always current.