How to create music
 

This is a fantastic interactive tutorial on how to create the various parts and put them together into a song.
Even if you have no desire to write music it gives you an understanding of the pieces.

If you learn the names of the pieces, and the common terms for parts within those pieces, you might be able to fake a conversation with your favorite band long enough to be invited backstage. Your virginity may vary.;)

That was an enjoyable hour and forty minutes.

Thank you.

Oh yes, you can spend all day there if you really want to learn and understand what's available, or you can run through it and pick up the terms and concepts to talk your way on to the band bus. ;)