This translation of The Inferno is by Henry Wadsworth Longfellow, and it is public domain. The newer translation we are reading in class is by John Ciardi, and it is copyrighted which is why it is not posted here.
The first file below is the text of the Longfellow translation. The files following it are MP3's of the Longfellow translation, five cantos at a time to keep the file size down to a reasonable level. These audio files are also public domain.
Feel free to download the audio files if you like so you can listen to them on your player. You can read the text on your computer screen. If you have a kindle or other electronic reader, free copies of the Longfellow translation of The Divine Comedy are available on line, and you can read it there.