Playing an audio file from GridFS

I am trying to write three little tools using GridFS with NodeJS.
One is to upload an audio file, the second is to download it and the third is to play it.

The first two (upload & download) are already working.

I can use them in the terminal with commands like:

node upload.js
node download.js

My problem concerns the last one (play).

For reference, this is the relevant code for the first (upload):

const mongoose = require('mongoose'),
	  mongoDB_URI = '...';

mongoose.connect(mongoDB_URI,{useNewUrlParser:true,
							  useUnifiedTopology:true});

const conn = mongoose.connection,
	  path = require('path'),
	  Grid = require('gridfs-stream'),
	  fs = require('fs');

var audioPath = path.join(__dirname, './readFrom/GridFSSample.ogg');

Grid.mongo = mongoose.mongo;

conn.once('open', () => {
	const gridFSBucket = new mongoose.mongo.GridFSBucket(conn.db);
	const writeStream = gridFSBucket.openUploadStream('TheDBGridFSSample.ogg');

	fs.createReadStream(audioPath).pipe(writeStream);

	writeStream.on('finish', () => {
		process.exit(0);
	});
});

This is the relevant code for the second (download):

const mongoose = require('mongoose'),
	  mongoDB_URI = '...';

mongoose.connect(mongoDB_URI,{useNewUrlParser:true,
							  useUnifiedTopology:true});

const conn = mongoose.connection,
	  Grid = require('gridfs-stream'),
	  fs = require('fs');

Grid.mongo = mongoose.mongo;

conn.once('open', () => {
	const gridFSBucket = new mongoose.mongo.GridFSBucket(conn.db);

	gridFSBucket.openDownloadStreamByName('TheDBGridFS.ogg').
    pipe(fs.createWriteStream('./writeTo/'+'GridFSFromDB.ogg')).
        on('error', function (error) {
            console.log("Error:" + error);
        }).
        on('finish', function () {
			process.exit(0);
        });
});

For the last (play), I would like to keep the same simple pattern.
I assume it should be somehow similar to the second (download); but I don’t have anything working at this point, even after trying a few solutions inspired from what I could find on the net. I hope someone can give me some good advice.

Here is the code I have (not working):

const mongoose = require('mongoose'),
	  mongoDB_URI = '...';

mongoose.connect(mongoDB_URI,{useNewUrlParser:true,
							  useUnifiedTopology:true});

const conn = mongoose.connection,
	  Grid = require('gridfs-stream'),
	  fs = require('fs');

Grid.mongo = mongoose.mongo;

conn.once('open', () => {
	const gridFSBucket = new mongoose.mongo.GridFSBucket(conn.db);

    gridFSBucket.openDownloadStreamByName('TheDBGridFS.ogg').
    pipe(fs.createReadStream()).
        on('error', function (error) {
            console.log("Error:" + error);
        }).
        on('finish', function () {
			process.exit(0);
        });
});