I gave up on Sonar and hoped that audio may have another solution in native WP or Elementor but audio seems badly supported in both. It is more frustrating in Elementor because it nearly works within the creation process, but fails when published. My unresolvable question was
“Elementor section displays audio in a way that default WordPress without Elementor does not display. So suspending Elementor … would not show the wonderful rounded grey play bar with the three dots that allows download. So I need Elementor for the display that it shows in the section, that is why I sent the attached images. The issue is that Elementor’s code that shows the grey rounded play bar with the three dots is lost when the post or page is published and the bar becomes the default black strip that does not have the three dots to download the file. ” So it is a WordPress core issue, not plugins or pagemakers at fault.