Whoah!
Despite you seeming to like Garageband, I've got to say that this is an instant improvement of instrument quality. That' or you've simply produced it very well. It's just so chill and warm to listen to .(I now love that oxymoron-ish sentence I created, and will claim copyright). This sounds a bit unlike some of your other work, apart from the bass and percussion. The melodies are somehow different (even though it's possible to hear some of your style in it). The melodies are still great though, if not even better than usually! Especially between 0:51 and 1:27. Spendid compositional transition at 1:07 :O! Same thing at 1:24 (I don't know why this one reminds me of the Futurama opening o.O). It's the chords borrowed from another key which sound so sweet!
Another song week seems great. Although the quality may not be the best, it's fun to listen to. Especially for a guy like me, who values composition more than production (though it's a very important aspect as well).
The low volume? I have a similar issue with Cubase. Well, I could upload things with more volume, but there'd be lots of clipping. Still, there are people with much higher volume and no problems. I wonder if an external soundcard could fix this :/ Either way, I'll probably get one eventually.