diff --git a/anki-editor.el b/anki-editor.el
index 92a7add..a7a58d4 100644
--- a/anki-editor.el
+++ b/anki-editor.el
@@ -273,6 +273,9 @@ The result is the path to the newly stored media file."
 (defconst anki-editor--ox-export-ext-plist
   '(:with-toc nil :with-properties nil :with-planning nil :anki-editor-mode t))
 
+(defconst anki-editor--audio-extensions
+  '(".mp3" ".3gp" ".flac" ".m4a" ".oga" ".ogg" ".opus" ".spx" ".wav"))
+
 (cl-macrolet ((with-table (table)
                           `(cl-loop for delims in ,table
                                     collect
@@ -372,8 +375,9 @@ The implementation is borrowed and simplified from ox-html."
             (org-html--format-image path attributes-plist info))
 
            ;; Audio file.
-           ((string-suffix-p ".mp3" path t)
-            (format "[sound:%s]" path))
+	   ((cl-some (lambda (string) (string-suffix-p string path t))
+		     anki-editor--audio-extensions)
+	    (format "[sound:%s]" path))
 
            ;; External link with a description part.
            ((and path desc) (format "<a href=\"%s\"%s>%s</a>"