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Re: Howto achieve best possible playback timing

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Den måndag 5 februari 2018 kl. 10:14:03 UTC+1 skrev Jonas Thörnvall:
> I must stop poll and do some more serious playback, but i am not sure how.
> 
> function play(){
>   var lastelement=track[0].midiMess.length;
>   var x=0;var time=0; var starttime=0; var clock=0;
>   time=performance.now();
>   starttime=time;
>   while(x<lastelement){
>     var time=performance.now();
>     clock=time-starttime; 
>     if(track[0].midiMess[x].time<=clock){
>         var noteOnMessage = [track[0].midiMess[x].data0,track[0].midiMess[x].data1,track[0].midiMess[x].data2];
>      output.send(noteOnMessage);  
>      x++;
>     }
>   }
> }
> 
> Well this is probably not ideal either, but better? If someone show me away to get the playup of events as accurate as possible i would be thankful.
> 
> function diffPlay(){
>   var lastelement=track[0].midiMess.length;
>   var x=0; 
>   var waitEv=new Array();
>   noteOnMessage=new Array();
>   
>   //INIT FIRST EVENT
>   waitEv[x]=track[0].midiMess[x].time;
>   var noteOnMessage[x] = [track[0].midiMess[x].data0,track[0].midiMess[x].data1,
>   track[0].midiMess[x].data2];
>   x++;
>   
>   //LOOP THRU ALL EVENTS CALCULATE TIMEDIFFERENCES
>   while(x<lastelement){
>     waitEv[x]=track[0].midiMess[x].time-track[0].midiMess[x-1].time;
>     x++;
>     var noteOnMessage[x] [track[0].midiMess[x].data0,track[0].midiMess[x].data1,
>     track[0].midiMess[x].data2];
>   }
>   y=0;
>   while(y<lastelement){
>     setTimeout(playEvent,waitEv[y]);
>     y++;
>   }
> }
> 
> function playEvent(){
>   output.send(noteOnMessage[y]); 
> }

Well i can see the looping around timout is just silly, so i probably should use setInterval but with different timings.

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Howto achieve best possible playback timing Jonas Thörnvall <jonas.thornvall@gmail.com> - 2018-02-05 01:13 -0800
  Re: Howto achieve best possible playback timing Jonas Thörnvall <jonas.thornvall@gmail.com> - 2018-02-05 02:37 -0800
    Re: Howto achieve best possible playback timing Jonas Thörnvall <jonas.thornvall@gmail.com> - 2018-02-05 02:38 -0800
      Re: Howto achieve best possible playback timing Jonas Thörnvall <jonas.thornvall@gmail.com> - 2018-02-05 02:54 -0800
      Re: Howto achieve best possible playback timing Jonas Thörnvall <jonas.thornvall@gmail.com> - 2018-02-05 06:09 -0800

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