Ok, now it’s clearer.
My question would be: if you just need to output text in a WYSIWYG field, why dont you just write the text in the_content() and attach the audio to that field as well? Why two fields?
But try this code and tell me if it works:
<div class="chapo">
<?php the_field('chapo'); ?>
</div>
<div class="content">
<?php the_content(); ?>
</div>
If it doesn’t, can you inspect the html with chrome or firefox and tell me what’s being displayed inside these divs?