I am trying to work with an audio file of a voice recording
someone sent me. The file has no extension.
I cannot play the file with either Musicmatch Jukebox or Windows Media Player.
The file will load into Jukebox, but no sound comes out when I press play.

I tried adding the extensions "mp3" and "wav" to see one of the audio
programs would recognize the file, but this did not work.
They still will not play the file.

I opened the file in a binary editor so I could look at the raw bytes.
The first few characters of the file are RIFF FA OL 0C WAVfmt,
where "FA" and "0C" are the hex representation of the bytes. The other
characters are printable ASCII characters. The string "WAVfmt" would
lead me to think the file was a WAVE file, but even if I add the ".wav"
extension, none of the audio programs can deal with the file.

Any suggestions on what kind of file it is and how to play it ? Thanks.