CsoundWeb constructor
      
      CsoundWeb({ 
    
    
- Function? onReady,
Implementation
CsoundWeb({Function? onReady}) {
  if(onReady != null) {
    onReadyCallback = onReady;
  }
  initializeCsound().then((value) {
    resumeAudioState();
    _csound = CsoundJsDart();
  });
}