npx skills add ...
npx skills add inference-sh/skills --skill ai-voice-cloning
AI voice generation, text-to-speech, and voice synthesis via inference.sh CLI. Models: Inworld TTS-2 (100+ languages, emotion/non-verbal steering), Inworld TTS 1.5 (ultra-low latency), ElevenLabs (22+ premium voices, 32 languages), Kokoro TTS, DIA, Chatterbox, Higgs, VibeVoice for natural speech. Capabilities: multiple voices, emotions, accents, long-form narration, conversation, voice transformation, delivery mode control, character voices. Use for: voiceovers, audiobooks, podcasts, video narration, accessibility, gaming NPCs, avatar audio, UGC. Triggers: voice cloning, tts, text to speech, ai voice, voice generation, voice synthesis, voice over, narration, speech synthesis, ai narrator, elevenlabs, eleven labs, natural voice, realistic speech, voice ai, voice changer, inworld, inworld tts, character voice, npc voice
npx skills add inference-sh/skills --skill ai-voice-cloning
Install the belt CLI skill:
npx skills add belt-sh/cli
Generate natural AI voices via inference.sh CLI.

Requires inference.sh CLI (
belt). Install instructions
| Model | App ID | Best For |
|---|---|---|
| Inworld TTS-2 | inworld/text-to-speech-2 | 100+ languages, emotion/non-verbal steering, delivery modes |
| Inworld TTS 1.5 Max | inworld/text-to-speech-1-5-max | Low latency (<200ms), 15 languages |
| Inworld TTS 1.5 Mini | inworld/text-to-speech-1-5-mini | Ultra-low latency (~120ms), 15 languages, real-time |
| ElevenLabs TTS | elevenlabs/tts | Premium quality, 22+ voices, 32 languages |
| ElevenLabs Voice Changer | elevenlabs/voice-changer | Transform existing voice recordings |
| 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 |
| 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 |
| Voice ID | Gender | Style |
|---|---|---|
bf_emma | Female | Refined |
bf_isabella | Female | Warm |
bm_george | Male | Classic |
bm_lewis | Male | Modern |
Inworld TTS-2 is purpose-built for character voices, gaming, and expressive speech. Use [brackets] inline for emotion, non-verbals, and delivery control:
Delivery modes: STABLE (consistent, narration), BALANCED (natural, default), CREATIVE (expressive, characters)
Steering examples: [laugh], [sigh], [whisper], [excited], [sad], [angry], [pause], [gasp]
Built-in voices (271+ across 15 languages): Sarah, Alex, Ashley, Dennis, Hana, Blake, Luna, Clive, and many more. Browse all at the Inworld TTS Playground.
For content over 5000 characters, split into chunks:
| 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 |
Use punctuation to control speech rhythm:
| Punctuation | Effect |
|---|---|
Period . | Full pause |
Comma , | Brief pause |
... | Extended pause |
! | Emphasis |
? | Question intonation |
- | Quick break |
Browse audio apps: belt app list --category audio