Perdón, la URL del audio que se reproduce correctamente es:
...................pluginfile.php/202112/mod_glossary/entry/1663/8976760253768259-audio.ogg
La que no se reproduce es:
...................draftfile.php/4232/user/draft/505634976/2601251376661029-audio.ogg
...................pluginfile.php/202112/mod_glossary/entry/1663/8976760253768259-audio.ogg
La que no se reproduce es:
...................draftfile.php/4232/user/draft/505634976/2601251376661029-audio.ogg