Firstly, good job on the design: the most important elements of your landing page stick out within the crucial first few seconds...take a quick look at the following EyeQuant analysis, which shows what users will see within their orientation phase: http://www.flickr.com/photos/eyequant/5488580976/

Headline: check Screenshots: check Social Proof: check Call to Action for musicians: check

(EyeQuant is my neurotechnology startup - we deliver over 90% of eye-tracking study's accuracy within seconds via a web service at http://eyequant.com)

However, I think you want to work on your message(s). First of all, you have two audiences (as reflected by your two call to action buttons):

1. musicians who'd like their music to go viral 2. listeners who'd like to discover new music

It would make sense to either have two distinct blocks on your landing page, where each comes with a single value proposition that is tailored towards each target segment:

1. "Let your tracks go viral via Facebook!" <-- more often than not, headlines like these convert much better than generic product descriptions (as in your current message...) 2. "Discover and download free music now!" <-- note how the second call to action in your current design is barely visible. A good workaround would be to introduce a second color that reflects the "other" value proposition in general, too.