fix(voice): 修复 MiMo TTS 无效音色与 TTS 配置后未自动激活、添加流式低延迟输出 - #331
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jubaoliang merged 1 commit intoAug 19, 2026
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…o-activate
1. TTS providers now auto-activate after configuration when the active
TTS is still "browser", mirroring the existing STT behavior.
2. Remove the invalid "mimo_default" voice option (not a valid MiMo
preset voice ID). The UI defaults to 冰糖; the backend maps legacy
"mimo_default" configs to 冰糖 so existing setups keep working.
3. MiMo TTS low-latency streaming end to end:
- Backend: request pcm16 + stream, parse SSE audio chunks and wrap
them in a live WAV container (24kHz PCM16LE mono)
- Router: return audio/wav for mimo, audio/mpeg otherwise
- Frontend: stream the response via requestStream and play chunks
incrementally with WebAudio (WavStreamPlayer), falling back to the
buffered blob path for non-WAV providers
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Summary
问题与修复
TTS 配置后未自动设为当前：STT 配置完成后会自动激活，TTS 却不会，
行为不对称。现与 STT 对齐——配置 TTS 提供商后，若当前仍为 browser 则自动切换。
无效音色 mimo_default：该 ID 并非官方预置音色（V2 时代概念，V2.5 已按
集群映射为冰糖/Mia），实际请求会报 invalid voice。UI 下拉框已移除并默认
「冰糖」；后端将存量 mimo_default 配置自动映射为冰糖，旧配置无需改动。
MiMo TTS 需等待整段合成完才出声：原实现为非流式请求 + 前端整包缓冲，
长文本延迟数秒。现全链路流式：
流式 WAV（24kHz PCM16LE 单声道）
非 WAV 提供商自动回落原缓冲路径，OpenAI/腾讯云/Edge 行为不变
测试
Target branch
develop(feature / fix — default)main(release/*orhotfix/*only)Type of change
Test plan
make allpasses locallyChecklist
CHANGELOG.md(if user-facing)