Bytedance

This page is auto-generated from model configurations. Last updated: 2026-07-29.

This reference lists all available Bytedance audio generation models and their parameters. Use these parameter names when calling the Generation API.

• Seed Audio 1.0
• Seed Audio 1.0 Multilingual

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Seed Audio 1.0

BytePlus Seed Audio text-to-speech with audio or image references, and fine-grained speech controls.

Model ID: model_byteplus-seed-audio-1-0

Capabilities: txt2audio

LLM Markdown: https://app.scenario.com/api/models/model_byteplus-seed-audio-1-0/markdown

Parameter	Type	Required	Default	Min	Max	Allowed Values	Description
textPrompt	string	Yes	-	-	-	-	The text you want spoken aloud, up to 2048 characters. When using audio references, point to each one in your text with @Audio1, @Audio2, or @Audio3.
audioReferences	file_array	No	``	-	-	-	Up to 3 audio samples to base the voice on. Refer to each one in your text as @Audio1, @Audio2, or @Audio3. Can’t be combined with image reference. Max duration: 30 seconds, Max size: 10 MB.
imageReference	file	No	-	-	-	-	A reference image to derive the voice from (JPEG, PNG, or WebP, up to 10MB). Can’t be combined with audio references. Max 10 MB.
sampleRate	number	No	44100	-	-	8000, 16000, 24000, 32000, 44100, 48000	The audio quality, in samples per second. Higher values sound clearer; 24 kHz is a good default for speech.
speechRate	number	No	0	-50	100	-	How fast the voice speaks. 0 is normal speed; higher is faster (100 is double speed), lower is slower (-50 is half speed).
loudnessRate	number	No	0	-50	100	-	How loud the voice is. 0 is normal; higher is louder (100 is double volume), lower is quieter (-50 is half volume).
pitchRate	number	No	0	-12	12	-	How high or low the voice sounds, in semitones (-12 to 12). Positive values raise the pitch; negative values lower it.

Seed Audio 1.0 Multilingual

BytePlus Seed Audio multilingual text-to-speech with 20-language support, audio or image references, subtitles, and fine-grained speech controls.

Model ID: model_byteplus-seed-audio-1-0-multilingual

Capabilities: txt2audio

LLM Markdown: https://app.scenario.com/api/models/model_byteplus-seed-audio-1-0-multilingual/markdown

Parameter	Type	Required	Default	Min	Max	Allowed Values	Description
textPrompt	string	Yes	-	-	-	-	The text you want spoken aloud, up to 3000 characters. Language is auto-detected. When using audio references, point to each one in your text with @Audio1, @Audio2, or @Audio3.
audioReferences	file_array	No	``	-	-	-	Up to 3 audio samples to base the voice on. Refer to each one in your text as @Audio1, @Audio2, or @Audio3. Can’t be combined with image reference. Max duration: 30 seconds, Max size: 10 MB.
imageReference	file	No	-	-	-	-	A reference image to derive the voice from. Can’t be combined with audio references. Max 10 MB.
sampleRate	number	No	44100	-	-	8000, 16000, 24000, 32000, 44100, 48000	The audio quality, in samples per second.
speechRate	number	No	0	-50	100	-	How fast the voice speaks. 0 is normal speed; higher is faster (100 is double speed), lower is slower (-50 is half speed).
loudnessRate	number	No	0	-50	100	-	How loud the voice is. 0 is normal; higher is louder (100 is double volume), lower is quieter (-50 is half volume).
pitchRate	number	No	0	-12	12	-	How high or low the voice sounds, in semitones (-12 to 12). Positive values raise the pitch; negative values lower it.
enableSubtitle	boolean	No	true	-	-	-	When on, the response also includes timing data (per word and per line) that can be used to build subtitles.