itechmeat/inworld
skills/inworld/SKILL.md
Inworld TTS API. Covers voice cloning, audio markups, timestamps. Use when integrating Inworld text-to-speech, cloning voices, adding audio markups (SSML-like), or aligning viseme timestamps. Keywords: Inworld, text-to-speech, TTS, voice cloning, visemes.
$ install --global
skillsauthnpx skillsauth add itechmeat/llm-code inworldInstall this skill globally with one command. Works with Claude Code, Cursor, and Windsurf.
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Last scanned: May 16, 2026, 7:13 AM203.9s6 files scanned
SKILL.md
- name:
- inworld
- description:
- Inworld TTS API. Covers voice cloning, audio markups, timestamps. Use when integrating Inworld text-to-speech, cloning voices, adding audio markups (SSML-like), or aligning viseme timestamps. Keywords: Inworld, text-to-speech, TTS, voice cloning, visemes.
- version:
- 2
- release_date:
- 2026-05-05
Inworld AI
Text-to-Speech platform with voice cloning, audio markups, and timestamp alignment.
Quick Navigation
| Topic | Reference | | ------------- | ----------------------------------------------- | | Installation | installation.md | | Voice Cloning | cloning.md | | Voice Control | voice-control.md | | API Reference | api.md |
When to Use
- Text-to-speech audio generation
- Voice cloning from 5-15 seconds of audio
- Emotion-controlled speech (
[happy],[sad], etc.) - Word/phoneme timestamps for lip sync
- Custom pronunciation with IPA
Models
| Model | ID | Latency | Price |
| ------------ | ---------------------- | ------- | ----------- |
| TTS-2 | inworld-tts-2 | latest | see pricing |
| TTS 1.5 Max | inworld-tts-1.5-max | legacy | legacy |
| TTS 1.5 Mini | inworld-tts-1.5-mini | legacy | legacy |
Minimal Example
import requests, base64, os
response = requests.post(
"https://api.inworld.ai/tts/v1/voice",
headers={"Authorization": f"Basic {os.getenv('INWORLD_API_KEY')}"},
json={"text": "Hello!", "voiceId": "Ashley", "modelId": "inworld-tts-1.5-max"}
)
audio = base64.b64decode(response.json()['audioContent'])
Key Features
- 15 languages — en, zh, ja, ko, ru, it, es, pt, fr, de, pl, nl, hi, he, ar
- Instant cloning — 5-15 seconds audio, no training
- Audio markups —
[happy],[laughing],[sigh](English only) - Timestamps — word, phoneme, viseme timing for lip sync
- Streaming —
/voice:streamendpoint - TTS-2 steering — natural-language bracketed directions such as
[say excitedly]or[whisper in a hushed style] - Delivery mode —
STABLE,BALANCED,CREATIVEtrade consistency for emotional range - Cross-lingual synthesis — reuse one voice across multiple languages; voice localization improves native-sounding output
Release Highlights (TTS-2)
Realtime TTS-2becomes the new primary model line viamodelId="inworld-tts-2".- Steering moves beyond the older fixed emotion tags: free-form bracketed directions can control style, pitch, speed, intensity, and non-verbals.
- Multilingual coverage expands with production quality across 15 languages and broader experimental coverage beyond that.
deliveryModeadds a stability-vs-creativity knob, and specifyinglanguagematters more for cross-lingual output quality.
Prohibitions
- Audio markups work only in English
- Use ONE emotion markup at text beginning
- Match voice language to text language
- Instant cloning may not work for children's voices or unique accents
Links
- Documentation
- Changelog
- Platform
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