ElevenLabsTextToSpeech - ComfyUI Built-in Node Documentation - ComfyUI

The ElevenLabs Text to Speech node converts written text into spoken audio using the ElevenLabs API. It allows you to select a specific voice and fine-tune various speech characteristics like stability, speed, and style to generate a customized audio output. The text must contain at least one character.

Inputs

Common Inputs

Parameter	Description	Data Type	Required	Range
`model`	Model to use for text-to-speech. Selecting a model reveals its specific parameters.	DYNAMIC_COMBO	No	`"eleven_v4"` `"eleven_v4_turbo"` `"eleven_multilingual_v2"` `"eleven_v3"`
`voice`	Voice to use for speech synthesis. Connect from Voice Selector or Instant Voice Clone.	CUSTOM	Yes	N/A
`text`	The text to convert to speech. Must contain at least one character.	STRING	Yes	N/A
`stability`	Voice stability. Lower values give broader emotional range, higher values produce more consistent but potentially monotonous speech (default: 0.5).	FLOAT	No	0.0 - 1.0
`apply_text_normalization`	Text normalization mode. ‘auto’ lets the system decide, ‘on’ always applies normalization, ‘off’ skips it.	COMBO	No	`"auto"` `"on"` `"off"`
`language_code`	ISO 639-1 language code (e.g., ‘en’, ‘es’, ‘ja’). Leave empty for automatic detection (default: "").	STRING	No	N/A
`seed`	Seed for reproducibility (determinism not guaranteed) (default: 1).	INT	No	0 - 2147483647
`output_format`	Audio output format.	COMBO	No	`"mp3_44100_192"` `"opus_48000_192"`

eleven_multilingual_v2 Inputs

These parameters become available when model is set to "eleven_multilingual_v2".

Parameter	Description	Data Type	Required	Range
`speed`	Speech speed. 1.0 is normal, <1.0 slower, >1.0 faster (default: 1.0).	FLOAT	No	0.7 - 1.2
`similarity_boost`	Similarity boost. Higher values make the voice more similar to the original (default: 0.75).	FLOAT	No	0.0 - 1.0
`use_speaker_boost`	Boost similarity to the original speaker voice (default: False).	BOOLEAN	No	True / False
`style`	Style exaggeration. Higher values increase stylistic expression but may reduce stability (default: 0.0).	FLOAT	No	0.0 - 0.2

eleven_v3 Inputs

These parameters become available when model is set to "eleven_v3".

Parameter	Description	Data Type	Required	Range
`speed`	Speech speed. 1.0 is normal, <1.0 slower, >1.0 faster (default: 1.0).	FLOAT	No	0.7 - 1.3
`similarity_boost`	Similarity boost. Higher values make the voice more similar to the original (default: 0.75).	FLOAT	No	0.0 - 1.0

eleven_v4 and eleven_v4_turbo Inputs

These parameters become available when model is set to "eleven_v4" or "eleven_v4_turbo".

Parameter	Description	Data Type	Required	Range
`similarity_boost`	Similarity boost. Higher values make the voice more similar to the original (default: 0.75).	FLOAT	No	0.0 - 1.0

Outputs

Output Name	Description	Data Type
`audio`	The generated audio from the text-to-speech conversion.	AUDIO

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