Previously the voice map referenced 10+ non-existent Edge TTS voice names (xiaohan, xiaochen, xiaoshuang, etc.), causing NoAudioReceived errors and fallback to browser default TTS. Now only maps to the 6 actually available Chinese voices (xiaoxiao, xiaoyi, yunxi, yunyang, yunjian, yunxia). Added voice speed adjustments and fixed --rate argument format for Windows. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>