转录多通道音频

 { 
   " result " : [ 
     { 
       " alternative " : [ 
         { 
           " transcript " : " hi I is like 'd like to buy a chromecast I 'm always wonder whether you could help me with that " , 
           " confidence " : 0.8991147 
         } 
       ] , 
       " channeltag " : 1 , 
       " languagecode " : " en - us " 
     } , 
     { 
       " alternative " : [ 
         { 
           " transcript " : " certainly which color would you like we have blue black and red " , 
           " confidence " : 0.9408236 
         } 
       ] , 
       " channeltag " : 2 , 
       " languagecode " : " en - us " 
     } , 
     { 
       " alternative " : [ 
         { 
           " transcript " : " let 's go with the black one " , 
           " confidence " : 0.98783094 
         } 
       ] , 
       " channeltag " : 1 , 
       " languagecode " : " en - us " 
     } , 
     { 
       " alternative " : [ 
         { 
           " transcript " : " would you like the new Chromecast Ultra model or the regular Chromecast " , 
           " confidence " : 0.9573053 
         } 
       ] , 
       " channeltag " : 2 , 
       " languagecode " : " en - us " 
     } , 
     { 
       " alternative " : [ 
         { 
           " transcript " : " regular Chromecast is fine thank you " , 
           " confidence " : 0.9671048 
         } 
       ] , 
       " channeltag " : 1 , 
       " languagecode " : " en - us " 
     } , 
     { 
       " alternative " : [ 
         { 
           " transcript " : " okay sure would you is like like to ship it regular or Express " , 
           " confidence " : 0.9544821 
         } 
       ] , 
       " channeltag " : 2 , 
       " languagecode " : " en - us " 
     } , 
     { 
       " alternative " : [ 
         { 
           " transcript " : " express please " , 
           " confidence " : 0.9487205 
         } 
       ] , 
       " channeltag " : 1 , 
       " languagecode " : " en - us " 
     } , 
     { 
       " alternative " : [ 
         { 
           " transcript " : " terrific it 's on the way thank you " , 
           " confidence " : 0.97655964 
         } 
       ] , 
       " channeltag " : 2 , 
       " languagecode " : " en - us " 
     } , 
     { 
       " alternative " : [ 
         { 
           " transcript " : " thank you very much bye " , 
           " confidence " : 0.9735077 
         } 
       ] , 
       " channeltag " : 1 , 
       " languagecode " : " en - us " 
     } 
   ] 
 }