While my daughter agrees with El_Titanium, my son just listened and he didn't hear anything odd in the recording.
Myself, I try not to comment because knowing what is written there, I know I can't give an unbiased listen - but my sense here is that this recording is fine - and better than anything it can be replaced with at the time since Duolingo is no longer paying for professional recordings for the Esperanto course.
You've posted this same comment at least six times this morning - often in threads with the answer to your concern already posted in it. The answer is:
Please help spread the word that when there is no sound, this is a Duolingo issue. There is nothing that the forum participants or even the Esperanto course team can do about it. Support supposedly knows, but it may be helpful for learners to continue to file bug reports so that they know it continues to be an issue and that people care about this.
To file a bug report, go to support.duolingo.com
To hear Esperanto go to Esperanto Variety Show on YouTube.