spawn play ENOENT NodeJS

I'm trying to use a library called troubadour :

const Troubadour = require('troubadour');
const troubadour = new Troubadour('sox');

app.get('/playmusics', function(req, res){

    troubadour.on('start', () => {
      // Do something here when the audio starts playing
      console.log('Começou');
    });

    troubadour.on('end', () => {
      // Do something here when the audio finishes playing
      console.log('Finalizado');
    });

    troubadour.play(__dirname+'/assets/musics/infiel.mp3');

    troubadour.on('error', (error) => {
      // Do something here to handle the errors
      console.log('Erro :( : ', error);
    });
});

But when I enter the URL /playmusics the server drops and returns the error in the terminal:

events.js:160
      throw er; // Unhandled 'error' event
      ^

Error: spawn play ENOENT
    at exports._errnoException (util.js:1026:11)
    at Process.ChildProcess._handle.onexit (internal/child_process.js:193:32)
    at onErrorNT (internal/child_process.js:359:16)
    at _combinedTickCallback (internal/process/next_tick.js:74:11)
    at process._tickCallback (internal/process/next_tick.js:98:9)

I do not know what it can be, because I've tried it in many ways and nothing works.