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openclaw - 💡(How to fix) Fix Feature: save TTS audio to disk during synthesis (talk/messages)

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Code Example

{
  talk: {
    provider: "elevenlabs",
    providers: {
      elevenlabs: {
        voiceId: "...",
        saveAudioTo: "~/workspace/tts/",      // 新增：保存目录
      },
    },
  },
  messages: {
    tts: {
      provider: "elevenlabs",
      providers: {
        elevenlabs: {
          saveAudioTo: "~/workspace/tts/",     // messages.tts 同理
        },
      },
    },
  },
}
RAW_BUFFERClick to expand / collapse

Feature Request: TTS 音频同时落盘

提交到 https://github.com/openclaw/openclaw/issues/new

问题描述

Talk 模式使用 ElevenLabs 等云端 TTS provider 时，音频实时流式传输给客户端播放，但从不落盘。用户想本地存档语音对话记录时，只能通过额外 API 调用重新生成音频，TTS 费用翻倍。

实际上，SpeechSynthesisResult.audioBuffer 在网关内存中已经存在，只需加一个写文件步骤。

建议方案

在 TTS/talk provider 配置中新增 saveAudioTo 字段：

{
  talk: {
    provider: "elevenlabs",
    providers: {
      elevenlabs: {
        voiceId: "...",
        saveAudioTo: "~/workspace/tts/",      // 新增：保存目录
      },
    },
  },
  messages: {
    tts: {
      provider: "elevenlabs",
      providers: {
        elevenlabs: {
          saveAudioTo: "~/workspace/tts/",     // messages.tts 同理
        },
      },
    },
  },
}

备选方案（已排除）

方案问题
响应后手动调 API 再生成费用翻倍
BlackHole 截取系统音频截取所有音频，非仅 TTS
HTTP 代理拦截复杂且脆弱

实现难度

低。audioBuffer 已存在，只需加 fs.writeFile + 配置开关。

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openclaw - 💡(How to fix) Fix Feature: save TTS audio to disk during synthesis (talk/messages)