Hello, this is my first post here, but it won't be my last -I am right now preparing a product for joint venture and need some help.

I have an audio file that I want to make available for download. It is 70 minutes in length and is on a CD.

How do I compress this audio file to as small a size as possible, and this file must be able to be played by WMP (Windows Media Player).

Sometimes I see 70 minute audio files that are about 30MB in size and others are only 10MB. What software allows me to make small audio files?

Thank you for your help.