I like the site, just a few things that I would fix if I was the owner of the site to make it better.
What's the use of the marked black space, get rid of it.
I would match the title and the H1 you have on the site, so they both will be
Free Music Downloads - TrackDeck
You should consider a wider phrases to a few more words like "Free Grunge mp3 music downloads" you would get better results.
I would change "Downloads" to "New Downloads" or "New MP3 Music Downloads" something that will be better on the SEO side of things.
I would move your download links to above the songs list.
For another kick ass idea that I would add, is maybe add lyrics to the songs with cross links to your site, that would do wonders to your traffic in the long run.