Speech recognizer not working: PCM WAV, AIFF/AIFF-C, or Native FLAC error

Question

I have the following audio file

It says the word 'down'

I am trying to turn the audio to text:

import speech_recognition 

r = sr.Recognizer()
with sr.AudioFile("example.wav") as source:
    audio = r.record(source)
    
    audio_data = r.listen(source)
try:
    s = r.recognize_google(audio)
    print("Text: "+s)
except Exception as e:
    print("Exception: "+str(e))

I get the error:

ValueError: Audio file could not be read as PCM WAV, AIFF/AIFF-C, or Native FLAC; check if file is corrupted or in another format

I tried all the solutions here

I tried to convert the audio file using wavio and scipy.io.wavfile

Any idea how to get around this?

I am using speech_recognition 3.9.0 and python 3.9