Update README

README.md

@@ -14,7 +14,7 @@ npm run demo
 ```
 Then open http://127.0.0.1:8080/
 # Theory of operation
-This component synchronizes rendering and playback of MusicXML documents. Rendering is done using existing Web-based music engraving libraries such as [OpenSheetMusicDisplay](https://github.com/opensheetmusicdisplay/opensheetmusicdisplay) or [Verovio](https://github.com/rism-digital/verovio). Playback uses standard MIDI files that are expected to correspond to the given MusicXML, and sends the MIDI events to either a Web MIDI output, or to a Web Audio synthesizer.
+This component synchronizes rendering and playback of MusicXML documents. Rendering is done using existing Web-based music engraving libraries such as [OpenSheetMusicDisplay](https://github.com/opensheetmusicdisplay/opensheetmusicdisplay) or [Verovio](https://github.com/rism-digital/verovio). Playback uses standard MIDI files that are expected to correspond to the given MusicXML, and sends the MIDI events to either a Web MIDI output, or to a Web Audio synthesizer, using the module [`midi-player`](https://github.com/infojunkie/midi-player).
 
 The crucial part of this functionality is to synchronize the measures and beats in the MusicXML file with the events of the MIDI file. In a nutshell, the player expects the provider of the MIDI file (an implementation of `IMidiConverter`) to supply a "timemap", which associates each measure in the MusicXML file to a timestamp at which this measure occurs. In the case of repeats and jumps, the same measure will be referenced several times in the timemap.