GET

/v1/schemas/fal/audio/fal-ai/ltx-2.3-quality/text-to-audio/lora

Accept:

kind inputactivity audiohash 99ca2d56…extracted Jul 6, 2026version currentsource upstream spec ↗

field	recorded source
schema	Source linked above. Source trace `808d8cf10fde8982775f67b5f0c42c26964c0821617fa58eee02b8bda625392f` { "fetchedAt": 1783331098, "extractorVersion": "1", "verifiedAt": null }

Request body

11 properties · 2 required · 1 $defs

property	type	description	constraints
prompt*	string	The prompt to generate the audio from.
loras*	LoRAInput[]	Up to 3 LoRAs to apply on top of LTX-2.3. Each path is downloaded through the registry SSRF-safe downloader before it is loaded. Max size: 3 GB per LoRA.	items ≤ 3
num_frames	integer	The audio duration expressed in LTX video-frame units. Duration is approximately num_frames / frames_per_second seconds.	9 ≤ n ≤ 481 · default: 121
enable_prompt_expansion	boolean	Whether to enable prompt expansion.	default: false
frames_per_second	number	Frame rate used to derive the generated audio duration.	1 ≤ n ≤ 60 · default: 24
enable_safety_checker	boolean	Whether to enable the safety checker.	default: true
negative_prompt	string	The negative prompt to steer generation away from.	default: "pc game, console game, video ga…
seed	integer	Random seed for reproducibility. If None, a random seed is chosen.	nullable
sync_mode	boolean	If True, the audio is returned as a data URI inline in the response. Useful for short-lived requests and tests.	default: false
guidance_scale	number	Classifier-free guidance scale.	1 ≤ n ≤ 20 · default: 1
num_inference_steps	integer	Number of inference steps.	8 ≤ n ≤ 30 · default: 15

Types

1 $defs

LoRAInputobject

A single LoRA to apply on top of the LTX-2.3 base model.

scale	number	Strength of the LoRA application (0.0 to 2.0). Higher values = stronger effect on the generated video.	0 ≤ n ≤ 2 · default: 1
path*	string	Direct HTTP(S) download URL of the LoRA file (.safetensors). The file is downloaded through an SSRF-safe downloader before it is loaded. Max size: 3 GB.	length ≤ 2048
transformer	enum	Forward-compatibility flag for multi-transformer architectures. LTX-2.3 has a single transformer, so 'both' is the right choice for almost all users.	high \| low \| both · default: "both"

Validate a payload

before you spend tokens

shell

$ curl -X POST https://modelschemas.com/v1/validate \
    -d '{"provider":"fal","endpointId":"fal-ai/ltx-2.3-quality/text-to-audio/lora","payload":{…}}'
→ {"valid": false, "errors": [{"path": "#", "keyword": "required", …}]}