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voice

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Convert text to speech audio using the `metabot voice tts` CLI. Use when the user asks you to speak, say something aloud, generate audio, or produce a voice recording.

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How to use this skill

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Source SKILL.md: https://github.com/xvirobotics/metabot/blob/HEAD/src/skills/voice/SKILL.md

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Text-to-Speech (Voice Output)

Generate MP3 audio from text using the metabot voice tts CLI.

Quick Commands

# Generate MP3, prints file path to stdout
metabot voice tts "Hello, this is a test"

# Generate and play immediately
metabot voice tts "Hello" --play

# Save to specific file
metabot voice tts "Hello" -o greeting.mp3

# Override provider and voice
metabot voice tts "Hello" --provider doubao --voice zh_female_wanqudashu_moon_bigtts

# Pipe text (useful for long content)
echo "Long text here" | metabot voice tts
echo "Long text" | metabot voice tts -o output.mp3

When to Use

  • User asks you to "say", "speak", "read aloud", or "generate audio/voice"
  • User wants a voice recording or audio version of text
  • User requests TTS (text-to-speech) output

Available Providers & Voices

Edge TTS (default, free, no key needed):

  • zh-CN-XiaoyiNeural (default) — Female Chinese
  • zh-CN-YunxiNeural — Male Chinese
  • zh-CN-XiaoxiaoNeural — Female Chinese
  • en-US-JennyNeural — Female English

Doubao (default when Volcengine keys configured):

  • zh_female_wanqudashu_moon_bigtts (default) — Female Chinese
  • Other Volcengine voice IDs from the TTS console

OpenAI (when OPENAI_API_KEY set):

  • alloy (default), echo, fable, onyx, nova, shimmer

ElevenLabs (when ELEVENLABS_API_KEY set):

  • Voice IDs from the ElevenLabs console

Text Limits

  • Doubao: ~300 Chinese characters (longer text is auto-truncated)
  • OpenAI / ElevenLabs / Edge: ~4000 characters

Guidelines

  • For short text (greetings, alerts), use inline: metabot voice tts "text"
  • For longer text, pipe through stdin: echo "..." | metabot voice tts
  • The output file is MP3 format
  • Use --play only when the user explicitly wants to hear the audio (it blocks until playback completes)
  • When saving files for the user, use -o with a descriptive filename
  • To send the audio to the user in Feishu, copy the file to the outputs directory: cp /tmp/metabot-voice-xxx.mp3 /tmp/metabot-outputs/<chatId>/