AI Voice Generation

Generate natural AI voices via inference.sh CLI.

Quick Start

bash

curl -fsSL https://cli.inference.sh | sh && infsh login

# Generate speech
infsh app run infsh/kokoro-tts --input '{
  "text": "Hello! This is an AI-generated voice that sounds natural and engaging.",
  "voice": "af_sarah"
}'

Available Models

Model	App ID	Best For
Kokoro TTS	`infsh/kokoro-tts`	Natural, multiple voices
DIA	`infsh/dia-tts`	Conversational, expressive
Chatterbox	`infsh/chatterbox`	Casual, entertainment
Higgs	`infsh/higgs-tts`	Professional narration
VibeVoice	`infsh/vibevoice`	Emotional range

Kokoro Voice Library

American English

Voice ID	Gender	Style
`af_sarah`	Female	Warm, friendly
`af_nicole`	Female	Professional
`af_sky`	Female	Youthful
`am_michael`	Male	Authoritative
`am_adam`	Male	Conversational
`am_echo`	Male	Clear, neutral

British English

Voice ID	Gender	Style
`bf_emma`	Female	Refined
`bf_isabella`	Female	Warm
`bm_george`	Male	Classic
`bm_lewis`	Male	Modern

Voice Generation Examples

Professional Narration

bash

infsh app run infsh/kokoro-tts --input '{
  "text": "Welcome to our quarterly earnings call. Today we will discuss the financial performance and strategic initiatives for the past quarter.",
  "voice": "am_michael",
  "speed": 1.0
}'

Conversational Style

bash

infsh app run infsh/dia-tts --input '{
  "text": "Hey, so I was thinking about that project we discussed. What if we tried a different approach?",
  "voice": "conversational"
}'

Audiobook Narration

bash

infsh app run infsh/kokoro-tts --input '{
  "text": "Chapter One. The morning mist hung low over the valley as Sarah made her way down the winding path. She had been walking for hours.",
  "voice": "bf_emma",
  "speed": 0.9
}'

Video Voiceover

bash

infsh app run infsh/kokoro-tts --input '{
  "text": "Introducing the next generation of productivity. Work smarter, not harder.",
  "voice": "af_nicole",
  "speed": 1.1
}'

Podcast Host

bash

infsh app run infsh/kokoro-tts --input '{
  "text": "Welcome back to Tech Talk! Im your host, and today we are diving deep into the world of artificial intelligence.",
  "voice": "am_adam"
}'

Multi-Voice Conversation

bash

# Generate dialogue between two speakers
# Speaker 1
infsh app run infsh/kokoro-tts --input '{
  "text": "Have you seen the latest AI developments? Its incredible how fast things are moving.",
  "voice": "am_michael"
}' > speaker1.json

# Speaker 2
infsh app run infsh/kokoro-tts --input '{
  "text": "I know, right? Just last week I tried that new image generator and was blown away.",
  "voice": "af_sarah"
}' > speaker2.json

# Merge conversation
infsh app run infsh/media-merger --input '{
  "audio_files": ["<speaker1-url>", "<speaker2-url>"],
  "crossfade_ms": 300
}'

Long-Form Content

Chunked Processing

For content over 5000 characters, split into chunks:

bash

# Process long text in chunks
TEXT="Your very long text here..."

# Split and generate
# Chunk 1
infsh app run infsh/kokoro-tts --input '{
  "text": "<chunk-1>",
  "voice": "bf_emma"
}' > chunk1.json

# Chunk 2
infsh app run infsh/kokoro-tts --input '{
  "text": "<chunk-2>",
  "voice": "bf_emma"
}' > chunk2.json

# Merge chunks
infsh app run infsh/media-merger --input '{
  "audio_files": ["<chunk1-url>", "<chunk2-url>"],
  "crossfade_ms": 100
}'

Voice + Video Workflow

Add Voiceover to Video

bash

# 1. Generate voiceover
infsh app run infsh/kokoro-tts --input '{
  "text": "This stunning footage shows the beauty of nature in its purest form.",
  "voice": "am_michael"
}' > voiceover.json

# 2. Merge with video
infsh app run infsh/media-merger --input '{
  "video_url": "https://your-video.mp4",
  "audio_url": "<voiceover-url>"
}'

Create Talking Head

bash

# 1. Generate speech
infsh app run infsh/kokoro-tts --input '{
  "text": "Hi, Im excited to share some updates with you today.",
  "voice": "af_sarah"
}' > speech.json

# 2. Animate with avatar
infsh app run bytedance/omnihuman-1-5 --input '{
  "image_url": "https://portrait.jpg",
  "audio_url": "<speech-url>"
}'

Speed and Pacing

Speed	Effect	Use For
0.8	Slow, deliberate	Audiobooks, meditation
0.9	Slightly slow	Education, tutorials
1.0	Normal	General purpose
1.1	Slightly fast	Commercials, energy
1.2	Fast	Quick announcements

bash

# Slow narration
infsh app run infsh/kokoro-tts --input '{
  "text": "Take a deep breath. Let yourself relax.",
  "voice": "bf_emma",
  "speed": 0.8
}'

Punctuation for Pacing

Use punctuation to control speech rhythm:

Punctuation	Effect
Period `.`	Full pause
Comma `,`	Brief pause
`...`	Extended pause
`!`	Emphasis
`?`	Question intonation
`-`	Quick break

bash

infsh app run infsh/kokoro-tts --input '{
  "text": "Wait... Did you hear that? Something is coming. Something big!",
  "voice": "am_adam"
}'

Best Practices

•Match voice to content - Professional voice for business, casual for social
•Use punctuation - Control pacing with periods and commas
•Keep sentences short - Easier to generate and sounds more natural
•Test different voices - Same text sounds different across voices
•Adjust speed - Slightly slower often sounds more natural
•Break long content - Process in chunks for consistency

Use Cases

•Voiceovers - Video narration, commercials
•Audiobooks - Full book narration
•Podcasts - AI hosts and guests
•E-learning - Course narration
•Accessibility - Screen reader content
•IVR - Phone system messages
•Content localization - Translate and voice

Related Skills

bash

# All TTS models
npx skills add inference-sh/agent-skills@text-to-speech

# Podcast creation
npx skills add inference-sh/agent-skills@ai-podcast-creation

# AI avatars
npx skills add inference-sh/agent-skills@ai-avatar-video

# Video generation
npx skills add inference-sh/agent-skills@ai-video-generation

# Full platform skill
npx skills add inference-sh/agent-skills@inference-sh

Browse audio apps: infsh app list --category audio