# 开发中使用——鸿蒙CoreSpeechKit让文字发声后续
开发中使用——鸿蒙CoreSpeechKit让文字发声后续设置音量大小volume设置播报相关参数this.extraParam{"queueMode":0,"speed":AppModel.speed,"volume":AppModel.volume,"pitch":1,"languageContext":'zhCN',"audioType":"pcm","soundChannel":3,"playType":1};设置播放速度"speed"设置播报相关参数this.extraParam{"queueMode":0,"speed":AppModel.speed,"volume":AppModel.volume,"pitch":1,"languageContext":'zhCN',"audioType":"pcm","soundChannel":3,"playType":1};