If your office network is anything like mine then your downloads must come through a firewall and, possibly, a virus checker. Some server AVs, unlike AVs made for PCs, will hash (pull apart and rebuild) your downloaded files but will delete anything it considers to be dangerous or against office policy. If this is the case then your MP3 files are being put back together minus certain bits, hence your corrupt files.

The only answer is to use another network, e.g. non-office.


UK Bob