Reducing size of music recording?

[blooz]

Last year sometime I recorded a few songs of a couple CDs into iTunes for putting on my shuffle. They were each in the 40-50 megabyte size range. Somehow I changed them from aiff to mp3's and to about 3 megabytes. But I don't remember how. i tried usint that SoundStudio program that came with the computer, but it didn't change the size or the aiff and the result sounded horrible to boot.

So I guess i need someone to tell me what I did. Too bad you weren't here.

The thought occurs that I had some demo program to do this with. Any suggestions?