- name
- lark-voice
- description
- Send voice messages on Lark (Feishu) by converting text to speech. Use when the user asks to send a voice message or reply with voice.
- metadata
- {
Lark (Feishu) Voice
Convert text to speech and send as a voice message on Lark (Feishu).
Requirements
ffmpeg— audio format conversion- At least one TTS source (skill or built-in tool)
Usage
1. Discover TTS Source
Scan installed skills for names containing tts, and check if the OpenClaw built-in tts tool is available.
- User specified a TTS source → use it directly
- Not specified, only one available → use it directly
- Not specified, multiple available → ask the user to choose
- None available → use the OpenClaw built-in
ttstool, and suggest installing a TTS skill for more voice options
2. Generate Audio
Call the selected TTS source to generate an audio file in wav/mp3 or other intermediate format, saved to /tmp/openclaw/.
3. Convert to Opus
Feishu voice messages only support the opus format (OGG container).
ffmpeg -y -i /tmp/openclaw/input.wav -c:a libopus -b:a 24k -ar 24000 -ac 1 /tmp/openclaw/voice.opus4. Send Voice
Use the message tool to send. The openclaw-lark plugin automatically detects the .opus extension, parses the duration, and delivers it as a msg_type: audio voice bubble.
message(action=send, media="/tmp/openclaw/voice.opus", message="optional text")