To add the player, first go to My Site > Media, and click on the audio file. Next, click the blue Edit button near the top of the Media area. You’ll see a pop up that has a COPY button in it. You can use that to copy the link to the file.
Once you have it copied, you can create a shortcode like the one below:
[audio src=https://your-file-link.mp3 autoplay=1]
You’d just replace https://your-file-link.mp3 with the link that you copied from the Media area.
Finally, you’ll add the Text Widget to your site’s footer, and paste the code into the Text tab of that widget.
David, thanks so much for your reply. With your help, and with the help of WordPress chat I was able to identify the widget area. And I was able to add some audio, and next I will add the shortcode to have some autoplay.