belt login
# Generate speech with ElevenLabs
belt app run elevenlabs/tts --input '{"text": "Hello, welcome to our product demo.", "voice": "aria"}'
Available Models
Model
ID
Best For
Latency
Multilingual v2
eleven_multilingual_v2
Highest quality, 32 languages
~250ms
Turbo v2.5
eleven_turbo_v2_5
Balance of speed & quality
~150ms
Flash v2.5
eleven_flash_v2_5
Ultra-low latency
~75ms
Voice Library
Female Voices
Voice
Style
aria
American, conversational
alice
British, confident
bella
American, warm
jessica
American, expressive
laura
American, professional
lily
British, soft
sarah
American, friendly
Male Voices
Voice
Style
george
British, authoritative
adam
American, deep
bill
American, mature
brian
American, conversational
callum
Transatlantic, intense
charlie
Australian, natural
chris
American, casual
daniel
British, commanding
eric
American, friendly
harry
American, young
liam
American, articulate
matilda
American, warm
river
American, confident
roger
American, authoritative
will
American, bright
Examples
Basic Speech
bash
belt app run elevenlabs/tts --input '{"text": "Welcome to our quarterly earnings presentation.", "voice": "george"}'
Choose a Model
bash
# Highest quality
belt app run elevenlabs/tts --input '{
"text": "This is our premium multilingual model with the best quality.",
"voice": "aria",
"model": "eleven_multilingual_v2"
}'
# Ultra-fast for real-time applications
belt app run elevenlabs/tts --input '{
"text": "Flash model for low-latency applications.",
"voice": "brian",
"model": "eleven_flash_v2_5"
}'
Voice Tuning
bash
belt app run elevenlabs/tts --input '{
"text": "Fine-tune the voice characteristics for your use case.",
"voice": "bella",
"stability": 0.3,
"similarity_boost": 0.9,
"style": 0.4
}'
Parameter
Range
Effect
stability
0-1
Higher = more consistent, lower = more expressive
similarity_boost
0-1
Higher = closer to original voice character
style
0-1
Higher = more style exaggeration
use_speaker_boost
true/false
Enhances speaker clarity
Output Formats
bash
# High-quality MP3
belt app run elevenlabs/tts --input '{
"text": "High quality audio output.",
"voice": "daniel",
"output_format": "mp3_44100_192"
}'
Format
Description
mp3_44100_128
MP3 at 44.1kHz, 128kbps (default)
mp3_44100_192
MP3 at 44.1kHz, 192kbps
pcm_16000
Raw PCM at 16kHz
pcm_22050
Raw PCM at 22.05kHz
pcm_24000
Raw PCM at 24kHz
pcm_44100
Raw PCM at 44.1kHz
Multilingual
ElevenLabs supports 32 languages including English, Spanish, French, German, Italian, Portuguese, Chinese, Japanese, Korean, Arabic, Hindi, Russian, and more.
bash
# Spanish
belt app run elevenlabs/tts --input '{
"text": "Hola, bienvenidos a nuestra presentación.",
"voice": "aria",
"model": "eleven_multilingual_v2"
}'
# French
belt app run elevenlabs/tts --input '{
"text": "Bonjour, bienvenue à notre démonstration.",
"voice": "alice",
"model": "eleven_multilingual_v2"
}'
Voice + Video Workflow
bash
# 1. Generate voiceover
belt app run elevenlabs/tts --input '{
"text": "Introducing the future of AI-powered content creation.",
"voice": "george"
}' > voiceover.json
# 2. Create talking head video
belt app run bytedance/omnihuman-1-5 --input '{
"image_url": "https://portrait.jpg",
"audio_url": "<audio-url-from-step-1>"
}'