Best way to compress wav files?

I have been recording lectures using my digital camera, and they come out in a wav format and like 200-300 MB for one hour of talking. That seems unecessarily huge. What is the best way to compress the files (maybe to mp3?) so that they are still decent enough quality to understand the speaking?

You can convert songs in your iTunes library to another format. When you convert a song in iTunes it will be converted to the format that you have set to import your CDs in. Converting creates a second copy of the song in the format you have chosen which gives you the opportunity to either keep or delete the original. If you are using iTunes 8 go to Edit>Preferences>General and click on Import Settings, change your option to MP3 for example. Go back to your library and highlight the songs you want to convert and go to the Advanced menu at the top of your iTunes window and choose "Create MP3 version": iTunes: How to convert a song to a different file format

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