I'm starting a blog, not just for music, but also to give me something to do in my spare time and help me document what I do on placement next year and I want to do a big mixtape every sunday as a giant mp3 file, instead of individual tracks. Like a podcast I guess.

Anyway I'd like something mac compatible, free, easy to use, which allows me to merge mp3 and wav files, as well as equalise them....Is that reasonable?