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

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

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

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

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

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

# 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:

# 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

# 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

# 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

# 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

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

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

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

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

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

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

Browse audio apps: infsh app list --category audio

ai-voice-cloning

AI Voice Generation

Quick Start

Available Models