ComfyUI Node
arkennemasis fal · ElevenLabs Sound Effects v2 · $0.002/s
Generate sound effects using ElevenLabs advanced sound effects model. Pricing (from fal, 2026-09-29): $0.002 per second (fal's billing unit). Model page: https://fal.ai/models/fal-ai/elevenlabs/sound-effects/v2 Key: FAL_KEY in the .env next to run_nvidia_gpu.bat. Results are saved in output/fal/fal-ai_elevenlabs_sound-effects_v2/.
arkennemasis fal · ElevenLabs Sound Effects v2 · $0.002/s
- audio
- audio_path
- info
◄text►
◄duration_seconds-1.00►
◄prompt_influence0.30►
◄output_formatmp3_44100_128►
◄loopfalse►
◄max_cost_usd20.0►
◄reuse_identical_runtrue►
◄extra_json►
◄max_concurrent1►
Categoryarkennemasis/fal/Audio/ElevenLabs
Inputs (9)
| Name | Type | Default | Description |
|---|---|---|---|
| text | STRING | The text describing the sound effect to generate | |
| duration_seconds | FLOAT | -1.00-1–22 | Duration in seconds (0.5-22). If None, optimal duration will be determined from prompt. -1 leaves it to the model. |
| prompt_influence | FLOAT | 0.300–1 | How closely to follow the prompt (0-1). Higher values mean less variation. |
| output_format | COMBO | mp3_44100_128 | Output format of the generated audio. Formatted as codec_sample_rate_bitrate. |
| loop | BOOLEAN | false | Whether to create a sound effect that loops smoothly. |
| max_cost_usdopt | FLOAT | 20.00–100000 | Safety cap. If the estimated cost of this run is above this many US dollars the node stops BEFORE sending anything to fal. 0 = no cap. |
| reuse_identical_runopt | BOOLEAN | true | If these exact inputs (the settings AND the same pictures/clips/audio) were already paid for and the files are still in output/fal, return them instead of paying again - also after a ComfyUI restart. Turn off for a fresh take with the same settings. |
| extra_jsonopt | STRING | Advanced: a JSON object merged into the request last, for any fal field this node has no box for. Example: {"seed": 7}. Leave empty normally. | |
| max_concurrentopt | INT | 11–32 | How many paid fal calls may run at the same time in one run, across every fal node. 1 (default) = one after another. This node starts its paid part only while fewer than this many fal calls are running. Once any fal node fails, the ones still waiting are not started, so nothing more is billed. |
Outputs (3)
| Name | Type | Description |
|---|---|---|
| audio | AUDIO | — |
| audio_path | STRING | — |
| info | STRING | JSON: request id, cost estimate, saved files and fal's full answer. |