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				@@ -237,6 +237,7 @@ export const getActiveMidiId = () => { 
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				  * @param val IMode 
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				  */ 
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				 export const changeMode = async (val: IMode, type?: string | undefined) => { 
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				+  // console.log('切换音源',val,state.songs) 
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				   const cm: IMode = val === 'background' ? 'music' : 'background' 
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				   // console.log(!state.songs[val], val, cm) 
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				   if (detailState.activeDetail.isAppPlay) { 
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				@@ -272,6 +273,10 @@ export const changeMode = async (val: IMode, type?: string | undefined) => { 
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				   //   return 
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				   // } 
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				   state.mode = val 
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				+  // 如果没有伴奏,音源切换按钮文案重置为原音 
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				+  if (!state.songs.background) { 
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				+    state.mode = 'music' 
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				+  } 
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				   if (type === 'all') { 
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				     state.audiosInstance?.setMute(true, state.songs[cm]) 
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				     state.audiosInstance?.setMute(true, state.songs[val]) 
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