Maybe I'm missing a new setting to change in the new JCE 2.9.x but I can't insert audio HTML files anymore.
This is what it looks like in an old article with audio files:
If you switch from the editor to the code window, this is what you get:
And when you come back to the editor or you save the article, this is what shows:
Reverting to JCE 2.8.18 fixes, and the audio insertion works as usual.
This is tested with JCE PRP 2.9.4 on latest Joomla! (PHP 7.4.11).
This is what it looks like in an old article with audio files:
If you switch from the editor to the code window, this is what you get:
And when you come back to the editor or you save the article, this is what shows:
Reverting to JCE 2.8.18 fixes, and the audio insertion works as usual.
This is tested with JCE PRP 2.9.4 on latest Joomla! (PHP 7.4.11).