Yes there are corrupt files out there filled with silence. More about that in a moment. Just as a last check, if you want to, is to download QCD which will play all audio formats (built-in codecs) & is free. Get it here:
http://www.quinnware.com/
As far as corrupt files go, see:
T3 Spammers & corrupt files & make a note about file size V's bit-rate (quality)!!!
A couple of people have suggested fixes to those so called corrupt files. There's apparently at least 2 utility apps out there that can fix many. I don't know about all. See these: 1.
video-fixer (fixes mp3's also) & 2.
MP3RepairTool
Tell us how well they work!?