No sound when I play the exported MP3 file

I have Audacity version 2.1.0. I am running it on an HP Pavilion dm1 Notebook PC, running Windows 7 Home Premium, 64-bit OS. I have an Encore Tech cassette player connected to the computer via a USB cable. I am not clear as to what I should set the preferences to. Either way, with the following Device preferences set:
Host: MME
Playback Device: Speakers and Headphones (IDT Hi
Recording Device: Microphone Array (USB Audio Con
I can record a track. I can play back and hear the track using the PLAY button on the Audacity control bar.Next, I select the recorded audio. I Click FILE and EXPORT SELECTED AUDIO. I give it a file name and click SAVE. I click OK. When I locate the saved MP3 file on my computer and double click, Windows Media Player plays the track, but I hear nothing. The speakers are not muted. The volume is turn all the way up. Any thoughts? Is the problem associated with the LAME DLL and this computer being 64-bit? All help welcome.

LAME is only for exporting MP3.

Most likely the act of connecting the cassette converter has switched the system default playback device to the converter. To fix it please see Why have I lost sound after connecting a USB device on Windows?.


Thanks so much! You put me on the right track. So long as the cassette was connected via the USB to the computer, it was using the cassette/USB as the output device. All I had to do was unplug it and wala! Sound from the computers speakers.Thanks Gale for your help!

If you would like connecting the converter not to change the Windows default playback device, connect the converter, use Windows Sound (Recording tab) to make the computer speakers the default playback device, then disconnect the converter.

Next time you connect the converter, the computer speakers should remain default device.